A dual controller storage array exists for one reason: keeping your data online if a controller dies. In this category, that redundancy is table stakes — what actually separates the options is connectivity (SAS vs. FC vs. iSCSI), drive form factor, and how much refurbishment risk you’re willing to accept for a lower entry cost. My top pick, the HPE MSA 2050 SAN (Q1J01A), offers the most current architecture and active vendor support in the lineup. Budget-minded buyers should look at the Seagate Exos X 2U12, which bundles capacity and dual 10Gb iSCSI controllers in one package, while the HPE MSA 2040 (K2R84A) balances cost and capability for SAS-attached workloads. The main tradeoff throughout this roundup: nearly everything here is refurbished, so warranty terms and controller firmware generation matter as much as raw specs. Keep reading for the full breakdown.
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Key Takeaways
- Connectivity is the single biggest differentiator: the lineup splits into SAS-attached arrays (MSA 2040, P2000 G3 SAS), Fibre Channel arrays (P2000 G3 FC, 2324fc G2, EVA4400), and iSCSI arrays (StoreVirtual 4330i, Exos X 2U12) — pick based on the network you already run, not on price alone.
- Only the HPE MSA 2050 (Q1J01A) represents a current-generation platform still supported by its vendor; every other pick is a legacy or refurbished system where warranty coverage and parts availability become the deciding factors.
- The P2000 G3 family appears in four variants (SAS, FC, FC/iSCSI combo, LFF), and choosing between them is really a networking decision — the chassis and controller redundancy are otherwise nearly identical.
- SFF (2.5-inch) systems like the MSA 2040 and 2324sa favor IOPS-dense virtualization workloads, while LFF (3.5-inch) systems like the AW593A and Exos X favor raw capacity per dollar.
- The Seagate Exos X 2U12 is the only pick that ships with drives included (192TB), which changes the value math entirely — every HP unit requires sourcing disks separately.
| dual controller storage array | Model | Condition | Product Line | Form Factor |
|---|---|---|---|---|
| HPE K2R84A Modular Smart Array | K2R84A (MSA 2040) | — | — | — |
| HPE StorageWorks P2000 G3 SAS | — | Refurbished | StorageWorks P2000 G3 MSA | Large Form Factor (LFF) drive bays |
| HP StorageWorks 2324sa G2 Dual | StorageWorks 2324sa G2 | Refurbished | — | — |
| HP StorageWorks P2000 G3 MSA F | — | Refurbished | StorageWorks P2000 G3 MSA | — |
| HPE StorageWorks EVA4400 Dual | AG637A | Refurbished | StorageWorks EVA4400 | — |
| Seagate Exos X 2U12 12-Bay SAN | — | Renewed | — | 2U rack mount |
| HPE CTO StorageWorks 2312fc G2 | AJ795A / StorageWorks 2312fc G2 | Refurbished | — | LFF (large form factor) modular |
| HP StorageWorks P2000 G3 MSA M | AP846A / P2000 G3 MSA | Refurbished | StorageWorks P2000 G3 MSA | SFF (small form factor) modular |
| HPE StoreVirtual 4330i G2 / St | AJ800AR / StorageWorks 2312i G2 | Factory refurbished | StoreVirtual / StorageWorks G2 | LFF (large form factor) |
| HP StorageWorks P2000 G3 SAS D | AW594A / P2000 G3 MSA | Refurbished | — | SFF array system |
| HP StorageWorks P2000 G3 FC/iS | AW567A | — | StorageWorks P2000 G3 MSA | Rack-mount chassis |
| HPE StorageWorks 2324fc G2 Dua | AJ797A | Refurbished | StorageWorks 2324fc G2 | Small Form Factor (SFF) |
| HPE StorageWorks MSA2012sa Dua | AJ753AB | Refurbished | StorageWorks MSA2012sa | — |
| HPE MSA 2050 SAN Dual Controll | Q1J01A | — | MSA 2050 SAN | 2U rack-mountable |
More Details on Our Top Picks
HPE K2R84A Modular Smart Array 2040 SAS Dual Controller SFF Storage
This is the pick that makes the most sense for buyers who want a genuinely modern dual controller array rather than a legacy refurb. The MSA 2040 pairs a refreshed controller architecture — four ports and 4GB of cache per controller — with support for SSD tiering, snapshots, volume copy, and optional replication, which translates into real headroom for virtualization and consolidation workloads. Compared with the P2000 G3 (AW593A), the MSA 2040 delivers roughly four times the performance of that older entry-SAN generation and offers flexible 16Gb FC, 10GbE iSCSI, or 12Gb SAS host connectivity, so you are not locked into one fabric. The tradeoff: it is the most capable option here, and the 57-pound chassis plus drive population costs mean smaller shops may not need this much array. ENERGY STAR certified power supplies soften ongoing operating costs. It ships with 64 snapshots and volume copy standard, not as paid extras.
Pros:- Quad-port controllers with 4GB cache each deliver roughly 4x the performance of prior entry-level SAN arrays
- Flexible host connectivity across 8/16Gb FC, 1/10GbE iSCSI, and 12Gb SAS
- SSD, snapshot, volume copy, and SED support with optional remote replication
- ENERGY STAR certified power supplies reduce ongoing energy costs
Cons:- 57-pound rack chassis assumes real server-room infrastructure
- Higher capability tier than budget buyers or legacy-only environments require
Best for: SMB and ProLiant shops building shared storage for virtualization or consolidation who need modern performance and flexible connectivity
Not ideal for: Homelab users or single-server deployments — the enterprise feature set and physical scale are overkill without shared storage requirements
- Brand:HPE
- Model:K2R84A (MSA 2040)
- Configuration:Dual controller, SFF drive bays
- Host Connectivity:8/16Gb FC, 1/10GbE iSCSI, 12Gb SAS
- Cache:4GB per controller
- Ports:Four per controller
- Data Protection:64 snapshots and volume copy standard; optional Remote Snap replication
- Item Weight:57 pounds
- Warranty:3-year limited parts
Our verdict“The strongest all-around choice for shops that want a modern, redundant entry SAN with room to grow instead of a refurbished legacy box.”
HPE StorageWorks P2000 G3 SAS Dual Controller LFF Array (AW593A, Refurbished)
Where the MSA 2040 (K2R84A) is built around speed and SSD tiering, the P2000 G3 LFF makes its case on raw spindle capacity. The large form factor chassis accepts bigger 3.5-inch SAS drives, which means more terabytes per bay — a practical advantage for backup targets, archival storage, or media libraries where IOPS matter less than bulk. The dual controller design still gives you active redundancy, so a controller failure does not take the array offline, which is the whole point of choosing this class of hardware. The obvious tradeoffs: this is a refurbished, end-of-life generation, so firmware support, spare parts, and drive availability will get harder over time, and the listing is sparse on included components — buyers should confirm what controllers and drives actually ship. Compared with the FC-based AP846A, this SAS model is simpler to cable directly to servers without a SAN switch, but it gives up fabric flexibility.
Pros:- LFF bays maximize capacity per drive slot for archival and backup workloads
- Dual controllers provide failover redundancy at a refurbished price point
- SAS host connectivity allows direct-attach to servers without FC switches
- Proven P2000 G3 platform with a large installed base and community knowledge
Cons:- End-of-life generation with shrinking firmware and parts support
- Refurbished listing lacks detail on included controllers and drives
Best for: Budget-conscious IT teams needing high-capacity shared storage for backups, archives, or file serving without a SAN fabric
Not ideal for: Anyone requiring current vendor support, warranties, or SSD-tier performance for demanding virtualization workloads
- Brand:HPE
- Part Number:AW593A
- Product Line:StorageWorks P2000 G3 MSA
- Configuration:Dual controller, LFF array system
- Host Connectivity:SAS
- Condition:Refurbished
- Form Factor:Large Form Factor (LFF) drive bays
Our verdict“A capacity-first choice for shops that need redundant bulk storage cheap and can live with legacy platform support.”
HP StorageWorks 2324sa G2 Dual Controller Modular Smart Array SFF (AJ807A, Refurbished)
The 2324sa G2 occupies a specific niche: 24 small-form-factor SAS bays in a dual controller modular chassis, aimed at direct-attached storage rather than SAN fabrics. That makes it a sensible step up from the MSA2012sa (AJ753AB), doubling the bay count for density-hungry setups while keeping the same simple SAS cabling model. For teams that want lots of 2.5-inch spindles — a good fit for databases or dense general-purpose storage — the SFF layout delivers more drives per rack unit than the LFF-based P2000 G3 (AW593A), trading per-bay capacity for spindle count and I/O parallelism. The honest downsides: this is an aging G2-generation platform, so expect no modern feature set — no SSD tiering, no flash-optimized caching — and refurbished hardware means uncertain remaining service life. The listing is also thin on configuration details, so verify drive and controller specifics before committing.
Pros:- 24 SFF bays offer high drive density for I/O-hungry workloads
- Dual controllers add failover protection uncommon in direct-attach enclosures
- Modular design supports expansion as storage needs grow
- SAS direct-attach avoids the cost and complexity of FC or Ethernet fabrics
Cons:- Legacy G2 platform lacks modern SSD and caching features
- Refurbished condition carries risk of wear and limited remaining lifespan
- Sparse listing leaves included configuration unclear
Best for: Small teams or branch offices that want dense direct-attach SAS expansion for a ProLiant server without SAN complexity
Not ideal for: Anyone wanting flash acceleration, snapshots at scale, or a platform with years of vendor support ahead of it
- Manufacturer:HP
- Model:StorageWorks 2324sa G2
- Part Number:AJ807A
- Configuration:Dual controller
- Drive Form Factor:Small Form Factor (SFF)
- Host Connectivity:SAS (direct attach)
- Condition:Refurbished
- ASIN:B00C8F9862
Our verdict“A budget pick for spindle-dense direct-attach SAS storage where redundancy matters more than modern features.”
HP StorageWorks P2000 G3 MSA FC Dual Controller SFF Array (AP846A, Refurbished)
This variant of the P2000 G3 matters for one reason: native Fibre Channel controllers. If your environment already runs an FC fabric, the AP846A drops in cleanly, whereas the SAS-based AW593A would force a direct-attach redesign and the 2324sa G2 cannot touch a fabric at all. The SFF chassis also shifts the balance from capacity toward spindle count and IO, making it better matched to transactional workloads than the LFF P2000 sibling. Refurbished pricing keeps the entry cost low for a genuine dual controller FC array with multipathing and controller failover — real availability features, not marketing gloss. The compromises are the same as the rest of the legacy HP lineup: this is a retired platform, FC switches and SFP modules add hidden infrastructure costs if you do not already own them, and the listing gives little away about what is included. Approach it as a fabric-expansion play, not a greenfield build.
Pros:- Native FC controllers integrate directly with existing SAN fabrics
- SFF bays favor higher spindle counts for transactional workloads
- Dual controller architecture provides multipathing and failover
- Refurbished pricing undercuts any comparable new FC array
Cons:- Requires FC switches and SFPs, adding cost for shops without a fabric
- End-of-life platform with declining firmware and parts support
- Minimal listing detail on included drives and controller firmware
Best for: IT teams with an existing Fibre Channel SAN who need to add redundant shared storage without new fabric investment
Not ideal for: Greenfield deployments without FC switches — the fabric requirements make iSCSI or SAS alternatives far cheaper to stand up
- Manufacturer:HP
- Part Number:AP846A
- Product Line:StorageWorks P2000 G3 MSA
- Configuration:FC dual controller, SFF modular array
- Host Connectivity:Fibre Channel
- Drive Form Factor:Small Form Factor (SFF)
- Condition:Refurbished
- ASIN:B00JJ503OK
Our verdict“The right refurb for shops already invested in Fibre Channel who need to extend shared storage on a budget.”
HPE StorageWorks EVA4400 Dual Controller Array (AG637A, Refurbished)
The EVA4400 is a different animal from the MSA-family options in this lineup. Where the MSA 2040 and P2000 G3 are entry-level arrays, the EVA line was built as true enterprise storage, with heavier-duty enclosures and management tooling aimed at larger virtualized estates. For organizations still standardized on EVA — needing a matching chassis for spares, expansion, or replacement during a migration — this refurbished AG637A is a pragmatic way to keep the lights on. Its dual controller configuration delivers the high-availability posture that class of hardware was designed for. The tradeoffs are stark, though: this platform dates back well over a decade, warranty coverage on a refurb may be limited or absent, and there is no upgrade path forward — HPE retired EVA long ago. Compared with the MSA 2040, you get older architecture with none of the modern SSD or replication conveniences. Buy it to sustain an existing EVA investment, not to start something new.
Pros:- Enterprise-grade chassis and dual controller high-availability design
- Keeps existing EVA management workflows and tooling consistent
- Refurbished pricing makes replacement hardware affordable for legacy sites
- Heavier-duty enclosure than entry-level MSA-class arrays
Cons:- Retired platform with no vendor roadmap or upgrade path
- Refurbished condition may carry limited or no warranty coverage
- Lacks modern features like SSD tiering and current replication software
Best for: Enterprises with legacy EVA environments needing replacement or expansion hardware during a phased migration
Not ideal for: New deployments or growing workloads — the retired platform offers no forward upgrade path or modern features
- Manufacturer:Hewlett Packard Enterprise
- Model:AG637A
- Product Line:StorageWorks EVA4400
- Configuration:Dual controller array
- Class:Enterprise storage
- Condition:Refurbished
- ASIN:B0GV9YLJM2
Our verdict“A bridge for existing EVA shops, not a fresh start — buy it to sustain a legacy environment through its final years.”
Seagate Exos X 2U12 12-Bay SAN Storage Array with Dual 10Gb/s iSCSI Controllers, 192TB SAS (Renewed)
This option stands out as the most complete package in the lineup because it ships with 192TB of enterprise SAS drives already installed, while most alternatives here arrive as empty chassis you have to populate yourself. Compared with the HP StorageWorks P2000 G3 MSA (AP846A), the Exos X 2U12 is a generation newer, with dual 10Gb/s iSCSI controllers, 16GB of cache, and 3.5GB/s throughput that small businesses can actually feel at the application layer. ADAPT self-healing and hot-swappable everything push availability toward 99.999%, which the older HPE boxes can’t match. The tradeoff: it’s renewed, not new, and all that capacity means more spinning 7.2K drives — no NVMe flash tier, and rebuilds on a full chassis take patience.
Pros:- 192TB of nearline SAS capacity included out of the box
- Dual controllers with four 10Gb/s iSCSI ports and 16GB system cache
- ADAPT self-healing data protection beyond traditional RAID
- Scalable up to three expansion enclosures as data grows
Cons:- Renewed hardware carries unknown wear history and potentially limited support
- All-HDD configuration with no flash tier limits IOPS-heavy performance
- 7.2K nearline drives mean slower rebuilds on large volumes
Best for: SMBs that want a turnkey SAN with drives included and room to scale via up to 3 expansion enclosures
Not ideal for: Latency-sensitive workloads like virtual desktop boot storms or databases needing flash-tier performance
- Form Factor:2U rack mount
- Drive Bays:12 (3.5-inch)
- Installed Capacity:192TB 7.2K nearline SAS
- Controllers:Dual 10Gb/s iSCSI (4 ports total)
- Cache:16GB per system
- Max Throughput:Up to 3.5GB/s
- Data Protection:ADAPT, replication, snapshots, encryption
- Expansion:Up to 3 additional expansion units
- Condition:Renewed
Our verdict“Buy this if you want the highest-capacity, most feature-rich dual-controller SAN in this roundup without sourcing drives separately.”
HPE CTO StorageWorks 2312fc G2 Dual Controller Modular Smart Array, LFF (AJ795A, Refurbished)
For buyers already running a Fibre Channel SAN fabric, this refurb makes sense as a low-cost way to add redundant block storage — the LFF chassis accepts inexpensive large-capacity 3.5-inch drives, keeping the total build cheaper than the SFF-based HP StorageWorks P2000 G3 MSA (AP846A), which needs pricier small-form-factor disks for equivalent raw space. The dual controller architecture delivers the failover protection that defines this category, and HPE’s modular Smart Array lineage means mature management tooling. The honest tradeoff is age: this is an older generation with limited documentation on the listing and no stated warranty, so compared with the Seagate Exos X 2U12 it’s a budget play, not a performance one. Plan on verifying firmware and controller health on arrival.
Pros:- LFF chassis supports low-cost high-capacity 3.5-inch drives
- True dual-controller failover in a modular Smart Array design
- Fibre Channel connectivity suits existing FC SAN fabrics
- Established HPE enterprise platform with mature tooling
Cons:- Sparse listing details with no stated warranty terms
- Older-generation hardware with shrinking parts availability
- Requires FC switches and HBAs most small setups don’t already own
Best for: Homelab builders and small shops with existing FC switches who want cheap, redundant large-capacity storage
Not ideal for: Anyone without Fibre Channel infrastructure — the controller ports won’t connect to standard Ethernet networks
- Manufacturer:Hewlett Packard Enterprise
- Model:AJ795A / StorageWorks 2312fc G2
- Controller:Dual Fibre Channel
- Form Factor:LFF (large form factor) modular
- Connectivity:Fibre Channel SAN
- Condition:Refurbished
- Drive Support:3.5-inch LFF drives
Our verdict“A sensible budget pick for FC-equipped environments, but anyone on Ethernet should look at the iSCSI-based Seagate instead.”
HP StorageWorks P2000 G3 MSA Modular Smart Array System, Dual FC Controllers, SFF (AP846A, Refurbished)
Where the 2312fc G2 favors capacity through big LFF disks, this P2000 G3 MSA takes the opposite approach: SFF bays pack more spindles into the same chassis, which translates directly into better IOPS for transactional workloads and more efficient 2.5-inch drive sourcing. The dual active Fibre Channel controllers give it genuine failover redundancy, and the MSA modular design supports JBOD expansion so the system grows with you. Compared with the SAS-based HP P2000 G3 (AW594A), the FC variant suits shops with a dedicated storage network rather than direct-attached SAS cabling. It’s still an aging platform — don’t expect modern features like deduplication, and the refurbished condition means cosmetic wear and short warranty coverage are real possibilities.
Pros:- SFF bays enable high storage density and more spindles per U
- Dual active FC controllers with automatic failover
- Modular design supports flexible expansion enclosures
- Widely documented MSA platform with a large admin knowledge base
Cons:- Refurbished condition may include cosmetic wear and reduced warranty
- Older-generation SAN lacking modern efficiency features
- 2.5-inch drives cost more per terabyte than LFF equivalents
Best for: SMBs needing dense 2.5-inch drive counts and higher spindle-based IOPS on an existing Fibre Channel network
Not ideal for: Buyers wanting modern feature sets or long-term vendor support — this generation is well past its prime
- Manufacturer:HP
- Model:AP846A / P2000 G3 MSA
- Product Line:StorageWorks P2000 G3 MSA
- Controller:Dual Fibre Channel
- Form Factor:SFF (small form factor) modular
- Drive Support:2.5-inch SFF drives
- Condition:Refurbished
Our verdict“The right choice when spindle density and FC connectivity matter more than raw capacity per dollar.”
HPE StoreVirtual 4330i G2 / StorageWorks 2312i G2 Dual Controller Array, LFF (AJ800AR, Refurbished)
This pick earns its slot by solving a specific problem the FC models can’t: it speaks iSCSI over standard Ethernet, so shops without a Fibre Channel fabric can still deploy a true dual-controller SAN using switches they already own. Like the 2312fc G2 (AJ795A), it uses an LFF chassis for cheap capacity, but the iSCSI controllers make it far easier to integrate into typical small-business networks. Pairing it with a unit like the Seagate Exos X 2U12 for comparison: Seagate wins on throughput and software features, but the 2312i G2 undercuts it on the buying decision when budget rules. The main caution is transparency — limited documentation and unstated warranty terms mean buyers should confirm firmware state and controller health before trusting production data to it.
Pros:- iSCSI connectivity works with standard Ethernet switches
- Dual controllers deliver genuine failover fault tolerance
- LFF design keeps capacity costs low with 3.5-inch drives
- Backed by HPE’s enterprise hardware pedigree
Cons:- Refurbished with no explicitly stated warranty coverage
- Minimal listing details make pre-purchase evaluation difficult
- Older platform with aging performance relative to newer arrays
Best for: Small businesses wanting dual-controller redundancy over plain Ethernet without investing in FC infrastructure
Not ideal for: Production environments requiring documented warranties and vendor support commitments
- Manufacturer:Hewlett Packard Enterprise
- Model:AJ800AR / StorageWorks 2312i G2
- Product Line:StoreVirtual / StorageWorks G2
- Controller:Dual iSCSI
- Form Factor:LFF (large form factor)
- Connectivity:iSCSI over Ethernet
- Condition:Factory refurbished
Our verdict“A practical Ethernet-friendly entry into redundant SAN storage, provided you accept the uncertainty of a lightly documented refurb.”
HP StorageWorks P2000 G3 SAS Dual Controller SFF Array System (AW594A, Refurbished)
Not every buyer needs a SAN fabric at all, and that’s where this SAS-connected P2000 G3 distinguishes itself from the FC-based AP846A: direct SAS attachment to a server skips switch licensing and fabric zoning entirely, making it the simplest path to redundant enterprise storage for a single-host or two-host setup. The dual-controller SFF chassis still delivers the failover and spindle density the P2000 line is known for, and positioning it for data center and HPC duty is realistic for DAS-style builds. Compared with the iSCSI-based 2312i G2, you trade network flexibility for lower latency and less configuration overhead. The drawbacks mirror the rest of this older generation: refurbished condition, aging architecture, and unclear warranty terms — verify what support the seller provides before committing.
Pros:- Direct SAS connectivity avoids SAN switch costs and zoning complexity
- Dual controllers maintain full redundancy for failover
- SFF bays support dense, higher-IOPS drive configurations
- Well-suited to data center and HPC direct-attach scenarios
Cons:- SAS cabling limits host count versus networked alternatives
- Older-generation hardware with a shorter remaining service life
- Warranty details not clearly specified by the seller
Best for: Teams wanting low-latency direct-attached shared storage for one or two servers without SAN switch complexity
Not ideal for: Environments needing multi-host networked storage — SAS attachment limits scalability compared with iSCSI or FC
- Brand:HP
- Model:AW594A / P2000 G3 MSA
- Connectivity:SAS direct attach
- Controllers:Dual controller
- Form Factor:SFF array system
- Compatible Devices:Servers, workstations
- Specific Uses:Data center, high-performance computing
- Condition:Refurbished
Our verdict“The pick for buyers who want dual-controller reliability without a storage network — just confirm the warranty before you buy.”
HP StorageWorks P2000 G3 FC/iSCSI Dual Combo Controller with LFF Chassis
What makes this P2000 G3 stand out in this lineup is its Combo FC/iSCSI controller, which lets one array serve both Fibre Channel hosts and budget-conscious iSCSI clients at the same time. No other pick here matches that protocol flexibility — the AW594A is SAS-only, and the 2324fc G2 locks you into Fibre Channel alone. For shops mid-migration between storage networks, that dual-protocol headroom saves a forklift replacement later.
The tradeoff is age and weight. At 65 pounds with an LFF chassis, it demands a proper rack and planning, and 8 Gb Fibre Channel is a generation behind the MSA 2050’s faster interconnects. Still, for departments that need large-capacity 3.5-inch drives and mixed-protocol access without paying twice, this is the most sensible bridge option in the roundup.
Pros:- Combo FC/iSCSI controllers serve both protocol types from one array
- LFF chassis supports high-capacity 3.5-inch drives for cheap bulk storage
- Dual controllers provide failover redundancy for departmental workloads
- Well-suited to gradual SAN migrations without replacing everything at once
Cons:- 8 Gb Fibre Channel is dated compared with newer controller generations
- At 65 pounds and 2U-plus, it requires proper rack infrastructure and planning
Best for: IT teams consolidating Fibre Channel and iSCSI workloads onto a single shared array with high-capacity LFF drives
Not ideal for: Anyone needing modern throughput or SSD-heavy tiers — the 8 Gb FC links and older controller generation lag behind the MSA 2050
- Brand:HP
- Model:AW567A
- Product Line:StorageWorks P2000 G3 MSA
- Controllers:Dual Combo FC/iSCSI
- Host Connectivity:8 Gb Fibre Channel / iSCSI
- Drive Form Factor:Large Form Factor (LFF)
- Form Factor:Rack-mount chassis
- Item Weight:65 lbs
Our verdict“Buy this if you need one array that speaks both FC and iSCSI today — skip it if you want current-generation speed.”
HPE StorageWorks 2324fc G2 Dual Controller Modular Smart Array (SFF), Refurbished (AJ797A)
Of the refurbished options in this roundup, the 2324fc G2 is the one that makes the most sense for a first Fibre Channel SAN. Its SFF enclosure favors fast 2.5-inch drives, so it behaves better as a transactional array than the LFF-heavy P2000 G3 Combo, which is built for capacity over speed. The modular architecture also means you can add enclosures later rather than starting over.
The compromises are real, though. This is an older-generation HPE platform, and the refurbished condition can mean cosmetic wear and shorter warranty coverage than a build-to-order unit like the MSA 2050. SFF bays also limit you to smaller drives, capping raw capacity per bay. Compared with the similarly refurbished 2324sa G2, the FC connectivity here suits established SAN shops, not Ethernet-only racks.
Pros:- Dual controllers deliver redundant, highly available block storage
- Modular design supports expansion enclosures as needs grow
- Refurbished pricing undercuts new enterprise arrays substantially
- SFF bays pair well with fast 2.5-inch drives for transactional workloads
Cons:- Refurbished condition may carry cosmetic wear and reduced warranty coverage
- Older G2-generation platform with limited modern feature support
- SFF drive compatibility narrows the pool of affordable replacement disks
Best for: Small businesses or labs adding Fibre Channel block storage to an existing FC fabric at minimal cost
Not ideal for: Sites without Fibre Channel switches — the lack of iSCSI or SAS flexibility makes it a poor fit for Ethernet-only environments
- Manufacturer:Hewlett Packard Enterprise
- Model:AJ797A
- Product Line:StorageWorks 2324fc G2
- Form Factor:Small Form Factor (SFF)
- Controllers:Dual Controller
- Connectivity:Fibre Channel
- Condition:Refurbished
Our verdict“A sensible low-cost entry into FC SAN storage — provided you already have the Fibre Channel fabric to plug it into.”
HPE StorageWorks MSA2012sa Dual Controller, Refurbished (AJ753AB)
The MSA2012sa occupies a distinct niche in this lineup: it’s the SAS-attached dual-controller array, which means you can connect servers directly without investing in Fibre Channel or Ethernet switching. Compared with the 2324fc G2, it trades fabric flexibility for plug-in simplicity — a genuine advantage for a two or three server room where a SAN switch would be wasted money. The dual controllers still provide the failover redundancy that defines this category.
Be realistic about age, though. This is the oldest platform here, a generation behind even the P2000 G3 units, so firmware support and spare-part availability are thinner than for the MSA 2040 or 2050. SAS direct-attach also caps scaling at a small number of hosts. As a cheap redundant storage shelf for a cramped server closet, it holds up; as a growing SAN core, it doesn’t.
Pros:- SAS direct-attach eliminates the cost of FC or Ethernet SAN switching
- Dual controllers provide genuine failover redundancy
- LFF-style enclosure suits cheap high-capacity disk buys
- Refurbished cost makes it one of the lowest entry points to redundant storage
Cons:- Oldest generation in the roundup, with limited ongoing firmware and parts support
- SAS attach restricts the number of connected servers
- Refurbished condition means uncertain warranty terms
Best for: Small server rooms that want redundant shared storage across two or three servers without buying SAN switches
Not ideal for: Growing environments — SAS direct-attach limits host counts and the aging platform has shrinking parts and firmware support
- Manufacturer:Hewlett Packard Enterprise
- Model:AJ753AB
- Product Line:StorageWorks MSA2012sa
- Controllers:Dual Controller
- Connectivity:SAS (direct attach)
- Condition:Refurbished
Our verdict“Pick this only for a small, static server setup where direct-attached redundancy beats fabric complexity.”
HPE MSA 2050 SAN Dual Controller SFF Storage (Q1J01A)
This is the pick I’d point most buyers toward, because it’s the newest generation in the entire roundup. The MSA 2050 sits a full two platform generations ahead of the P2000 G3 Combo and the MSA2012sa, which translates into faster controllers, better SSD support, and a longer runway for firmware updates. With 24 SFF bays accepting both HDDs and SSDs, it handles mixed-tier workloads that the older arrays simply weren’t designed for.
The build-to-order nature means drives and support are typically purchased separately, so the sticker rarely tells the whole story — budget for populated bays and a support contract. And unlike the P2000 G3 Combo’s dual-protocol flexibility, you’ll want to confirm your connectivity choice at purchase. But for mixed SSD/HDD performance with dual-controller redundancy, nothing else here competes.
Pros:- Newest platform generation in the roundup, with longer firmware and support runway
- 24 SFF bays support both HDDs and SSDs for genuine tiered storage
- Dual SAS controllers deliver active failover and solid aggregate throughput
- 2U rack form factor is compact relative to its bay count
Cons:- Build-to-order configuration usually excludes drives and support, inflating true deployment cost
- Newer platform costs more than refurbished P2000 and MSA2000 alternatives
Best for: SMBs and branch offices that want a current-generation, SSD-ready dual-controller SAN with real vendor support
Not ideal for: Hobbyists and home labs — build-to-order pricing and enterprise support expectations make it overkill for lab duty
- Brand:HPE
- Model:Q1J01A
- Product Line:MSA 2050 SAN
- Controllers:Dual SAS Controller
- Total Bays:24 x 2.5-inch SFF
- Drive Support:24 HDD or 24 SSD
- Form Factor:2U rack-mountable
- Item Weight:57.3 lbs
Our verdict“If your budget stretches to new hardware, this is the dual-controller array to beat — everyone else should shop the refurb picks above.”
How We Picked
Because almost every array in this roundup is refurbished, I judged each one first on platform generation and supportability — a dual controller array is only redundant if you can actually get replacement controllers, and a dead-ended platform loses its core advantage. Second, I weighed host connectivity: SAS, Fibre Channel, and iSCSI arrays serve genuinely different infrastructures, and the best pick for one shop is wrong for another. Third, I evaluated drive density and form factor, since SFF and LFF chassis point at opposite workload profiles. Finally, I factored what’s included — drives, rails, licenses — because a cheap empty enclosure can cost more to fill than a bundled system.
The ranking reflects a simple logic: current, supported platforms first, then well-supported legacy platforms with strong connectivity flexibility, then older systems that only make sense at aggressive prices. Refurbished units were compared on the strength of their platform rather than the luck of any individual unit, which is why the P2000 G3 variants cluster together despite small spec differences.
| dual controller storage array | Product Line | Condition | Manufacturer |
|---|---|---|---|
| HPE K2R84A Modular Smart Array | — | — | — |
| HPE StorageWorks P2000 G3 SAS | StorageWorks P2000 G3 MSA | Refurbished | — |
| HP StorageWorks 2324sa G2 Dual | — | Refurbished | HP |
| HP StorageWorks P2000 G3 MSA F | StorageWorks P2000 G3 MSA | Refurbished | HP |
| HPE StorageWorks EVA4400 Dual | StorageWorks EVA4400 | Refurbished | Hewlett Packard Enterprise |
| Seagate Exos X 2U12 12-Bay SAN | — | Renewed | — |
| HPE CTO StorageWorks 2312fc G2 | — | Refurbished | Hewlett Packard Enterprise |
| HP StorageWorks P2000 G3 MSA M | StorageWorks P2000 G3 MSA | Refurbished | HP |
| HPE StoreVirtual 4330i G2 / St | StoreVirtual / StorageWorks G2 | Factory refurbished | Hewlett Packard Enterprise |
| HP StorageWorks P2000 G3 SAS D | — | Refurbished | — |
| HP StorageWorks P2000 G3 FC/iS | StorageWorks P2000 G3 MSA | — | — |
| HPE StorageWorks 2324fc G2 Dua | StorageWorks 2324fc G2 | Refurbished | Hewlett Packard Enterprise |
| HPE StorageWorks MSA2012sa Dua | StorageWorks MSA2012sa | Refurbished | Hewlett Packard Enterprise |
| HPE MSA 2050 SAN Dual Controll | MSA 2050 SAN | — | — |
Factors to Consider When Choosing Dual Controller Storage Array
Buying a dual controller array — especially a refurbished one — involves decisions that go well beyond comparing the fourteen products above. These are the factors that most often make or break the purchase.Match Connectivity to the Network You Already Have
The most common mistake in this category is buying an array whose connectivity doesn’t fit the existing environment. A Fibre Channel array like the EVA4400 assumes you have — or will buy — FC HBAs, FC switches, and the zoning knowledge to run them, which can quietly double the total project cost. A SAS-attached array is the simplest path for a single-server or two-server setup, but SAS has real distance and device-count limits that make it a poor fit for shared multi-host SAN use. iSCSI arrays ride on standard Ethernet, which makes them the cheapest to deploy, but they demand properly configured separate network paths or you’ll trade away the availability you bought the second controller for. Before choosing any product, inventory your switches, HBAs, and admin skills — the array should follow the network, not the other way around.
Refurbished Means You’re Buying the Seller, Not Just the Array
Nearly every unit in this roundup is refurbished, and that changes what due diligence looks like. Dual controller arrays fail in specific ways — failed cache batteries, mismatched firmware between controllers, and worn drive carriers — and a careless refurbisher will pass all three along to you. Ask specifically about controller firmware matching, since mismatched controllers can cause failovers that don’t actually fail over. Confirm whether cache battery modules were replaced, because expired batteries silently disable write-back caching and gut performance. Finally, check the warranty length and whether it covers advance replacement; a 30-day return policy is not a warranty on a device meant to run for five more years.
Platform End-of-Life Determines Real Longevity
A dual controller array protects against hardware failure, but it can’t protect against a platform falling off support. Vendors stop issuing firmware updates, security patches, and drive compatibility lists — and eventually stop selling compatible drives at all. The MSA 2050 sits comfortably inside its support window, while the P2000 G3 and MSA 2000 G2 families are legacy platforms where you’re accepting a shorter remaining lifespan in exchange for a much lower purchase price. That trade is often rational for test labs, branch offices, or backup targets, but it’s a poor fit for primary production storage in a growing business. Ask yourself how many years this array needs to last, and buy a platform with at least that much runway.
SFF vs. LFF: Choose Based on Workload, Not Bay Count
Small-form-factor (2.5-inch) and large-form-factor (3.5-inch) chassis look similar on a spec sheet but serve different masters. SFF chassis like the MSA 2040 favor spindle count and IOPS, which matters for virtualization, databases, and anything with lots of random I/O. LFF chassis favor capacity per dollar and per watt, which suits file storage, backup repositories, and media. Don’t be fooled by bay counts alone — a 12-bay LFF system can hold far more raw capacity than a 24-bay SFF system. Also confirm which drive types the platform supports, because older controllers may not recognize modern high-capacity SAS drives without firmware updates the vendor may no longer provide.
Budget for the Complete System, Not the Enclosure
The sticker price of a dual controller array is usually only part of the cost. Most units ship without drives, so a 24-bay enclosure filled with enterprise SAS drives can cost several times its own price to populate. Add SFP modules or transceivers for FC and iSCSI arrays, which are frequently not included, plus rails, cables, and any software feature licenses — snapshot, replication, and thin provisioning features are often pay-to-unlock on this class of hardware. The Seagate Exos X stands out precisely because it bundles drives, which is why an apparently pricier box can end up cheaper than an empty chassis. Build the full bill of materials before comparing any two products.
Active/Active vs. Active/Passive Controllers
Not all dual controller implementations behave the same way, and this is where marketing language obscures real differences. Some platforms run both controllers actively and load-balance paths; others keep one controller passive until failover, meaning you’ve paid for hardware that idles. More importantly, check how path management works — arrays that require multipath I/O configuration on every host add setup labor and a common source of misconfiguration. For smaller shops without dedicated storage admins, simpler failover behavior often beats a marginally faster active/active design. Read the failover documentation, not just the datasheet, before committing.
Frequently Asked Questions
Is a refurbished dual controller array actually safe for production use?
It can be, but only if you buy from a refurbisher who replaces wear components rather than just wiping and reshipping. The parts that age in these arrays are the cache battery modules, fans, and drive carriers — and a refurbisher who won’t confirm those were replaced is passing risk to you. Match the platform’s age to the criticality of the workload: a P2000 G3 is a reasonable choice for secondary storage or a small production environment, while something hosting your only copy of business data deserves a supported platform like the MSA 2050. Also verify that both controllers run the same firmware version before deployment, because mismatched controllers are a leading cause of failed failovers in secondhand arrays.
Should I choose SAS, Fibre Channel, or iSCSI connectivity?
Choose based on the infrastructure and skills you already have, not on theoretical performance. SAS is ideal when the array attaches directly to one or two servers — no switches needed, minimal configuration — but it doesn’t scale to shared storage across many hosts. Fibre Channel delivers the most predictable performance and isolation, but requires FC switches, HBAs, and zoning expertise that smaller IT teams often lack. iSCSI runs over standard Ethernet and is the cheapest to deploy, though it needs dedicated network paths and jumbo-frame tuning to perform well. If you’re starting from zero, iSCSI options like the StoreVirtual 4330i or Exos X have the lowest total cost of entry.
Do both controllers give me double the performance?
Usually not, and expecting that leads to disappointment. In active/passive designs, the second controller exists purely for failover and contributes nothing to day-to-day throughput. Even in active/active platforms, cache is typically mirrored between controllers, which adds a small write latency penalty in exchange for data safety during failover. What the second controller genuinely buys you is availability: the ability to survive a controller failure, and on most platforms to apply firmware updates without an outage. If performance is your bottleneck, adding faster drives or more spindles will do far more than the second controller ever will.
Why do several picks look almost identical — the P2000 G3 variants, for example?
Because vendors sell the same chassis with different controller modules, and the differences matter mostly for connectivity rather than capability. The P2000 G3 SAS, FC, and FC/iSCSI combo versions share the same enclosure, drive support, and management software — what changes is how hosts connect. The combo controller version is attractive when you want to migrate between FC and iSCSI over time, or support both simultaneously during a transition. If you see two P2000 G3 listings at similar condition, the right choice is simply whichever matches your network. What you shouldn’t do is pay a premium for combo controllers you’ll never use.
Can I put modern high-capacity drives into an older array?
Only if the controller firmware supports them, and this is one of the biggest hidden traps with legacy platforms. Each platform has a supported drive list, and older controllers frequently can’t address drives above a certain capacity or may not recognize newer sector formats. Some refurbishers install unsupported drives that appear to work but fail under load or drop during rebuilds — a failure mode that shows up months after purchase. Check the vendor’s compatibility matrix for the exact firmware version running on the array before buying any drives. On end-of-life platforms, sourcing drives already validated for the controller is often safer than chasing maximum capacity.
Conclusion
For best overall, the HPE MSA 2050 (Q1J01A) is the clear choice — it’s the only current-generation platform in the lineup, with vendor support, modern drive compatibility, and years of firmware runway ahead of it. The Seagate Exos X 2U12 takes best value for most buyers simply because it includes 192TB of drives, turning what looks like a bigger purchase into the smallest complete system here. For best premium, the MSA 2040 (K2R84A) pairs a still-capable platform with SAS simplicity and strong entry-level SAN features without stepping all the way up to the 2050’s price.
If you’re new to shared storage, the StoreVirtual 4330i G2 is the gentlest on-ramp — iSCSI means no FC switching knowledge required, and its management is approachable. For specific needs: the P2000 G3 FC/iSCSI combo unit suits shops planning a network migration; the EVA4400 appeals to existing FC environments wanting cheap capacity; and the LFF refurbished units like the AW593A make sense as backup targets or media repositories where capacity per dollar beats platform freshness. Whatever you choose, remember that in this category the refurbisher’s warranty policy often matters more than any single spec on the box.
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