{"product_id":"dell-poweredge-r840-24-bay-2-5-chassis","title":"Dell PowerEdge R840 24-Bay 2.5\" Drives [14th Gen]","description":"\u003cp\u003eThe Dell PowerEdge R840 24-Bay 2.5\" pairs the 14th generation 4-socket scale-up platform with maximum SFF storage density: twenty-four 2.5\" hot-swap bays in the 2U chassis alongside up to four 2nd Generation Intel Xeon Scalable (Cascade Lake) processors, up to 6 TB of memory across 96 DDR4 DIMM slots, up to 8 PCIe Gen3 slots, iDRAC9 management with Silicon Root of Trust, and up to four Dell Flex Slot power supplies. This is a deliberately specialized configuration: 4-socket compute for scale-up workloads combined with 24-bay SFF storage for database, analytics, or HCI data that lives locally rather than on a SAN.\u003c\/p\u003e\n\u003cp\u003eRefurbished and configured to order. This page focuses on what is specific to the 24-bay variant: when 24 SFF bays alongside 4-socket compute is the right tool, the bay-count-driven workload patterns, and the storage controller and power decisions that change at 24 bays. For the full R840 platform documentation, including the honest framing on when 4-socket compute is and is not the right call, the processor and memory architecture, and the cross-vendor reference, see the \u003ca href=\"\/products\/dell-poweredge-r840-8-bay-2-5-chassis\"\u003eR840 8-Bay 2.5\"\u003c\/a\u003e primary R840 page.\u003c\/p\u003e\n\u003cp\u003eTo configure a build, call 1-800-778-1545 or use the quote form below. Every refurbished unit ships under our 180-day warranty with 12+ hour burn-in testing, and volume pricing starts at 5 units. The 24-bay configuration benefits from extra design discussion: 4-socket compute plus 24 SSDs in 2U is genuinely dense, and the architectural choices have downstream operational consequences worth getting right at quote time.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhen 24 SFF Bays Is the Right Combination\u003c\/h2\u003e\n\u003cp\u003eThe 24-Bay R840 is a deliberately narrow configuration. Most 4-socket workloads (SAP HANA, Oracle Database, mission-critical virtualization, SQL Server Enterprise) do not need 24 local SFF drives. They either use a SAN for primary storage or a smaller number of high-performance local SSDs alongside networked storage, which is exactly what the 8-Bay variant is built for. The 24-Bay earns its place only when both 4-socket compute and high-density local SSD storage are genuine requirements. The specific scenarios:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSAP HANA with a large local SSD persistence layer.\u003c\/strong\u003e HANA in-memory databases benefit from local SSD for log persistence and warm-data tiering rather than depending on SAN latency for log writes. 24 SFF bays alongside HANA-scale memory (up to 6 TB DDR4, more with Optane Persistent Memory on L-series CPUs) enables a complete in-memory plus fast-persistence architecture in a single chassis. The persistence layer fits in the chassis instead of crossing the SAN, which matters for HANA savepoint and log-replay latency.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOracle Database with local ASM diskgroups.\u003c\/strong\u003e Oracle RAC or large-instance Oracle where the design choice is local SSD storage rather than SAN. 24 SAS SSDs in ASM disk groups deliver high IOPS and predictable latency without the SAN dependency. Common when SAN is unavailable, undesirable for cost reasons, or when the database team has standardized on ASM-on-local-SSD.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSQL Server Enterprise with extensive tempdb and log staging on local SSD.\u003c\/strong\u003e Per-core SQL Server licensing economics already favor consolidation on 4-socket compute; pairing with 24 high-endurance SSDs lets the entire tempdb plus transaction log infrastructure live on local SAS rather than crossing the SAN. Datafile-on-SAN plus tempdb-and-logs-on-local-SSD is a documented Microsoft pattern for performance-sensitive SQL Server deployments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-density VMware vSAN ReadyNode at 4-socket scale.\u003c\/strong\u003e vSAN configurations at 24 SFF bays with 4-socket compute deliver high VM density per host. Fewer, larger HCI nodes reduce vSphere license count (which is per-CPU socket) and rack footprint. The 24-bay R840 is at the high end of the vSAN ReadyNode footprint and works well when the goal is consolidating to the fewest hosts possible.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIn-memory analytics with a large local hot-data tier.\u003c\/strong\u003e Analytics workloads (in-memory data grids, search hot-tiers) that need both maximum processing capacity (4-socket) and large local SSD datasets that do not fit entirely in DRAM but are too latency-sensitive for SAN. 24 SAS SSDs as a tiered hot-data layer behind in-memory analytics is a meaningful configuration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicrosoft Storage Spaces Direct (S2D) at 4-socket scale.\u003c\/strong\u003e S2D requires HBA-mode storage and benefits from high drive counts per node for performance scaling. 24 SAS or NVMe SSDs in a 4-socket S2D node delivers a high-density HCI design with the per-node compute headroom to host many workloads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf either the 4-socket compute or the 24-bay storage capacity is more than the workload actually needs, a different platform delivers better economics. The dual-socket \u003ca href=\"\/products\/dell-poweredge-r740xd-24-bay-2-5-chassis\"\u003eR740xd 24-Bay 2.5\"\u003c\/a\u003e covers high-density storage at lower cost; the \u003ca href=\"\/products\/dell-poweredge-r840-8-bay-2-5-chassis\"\u003eR840 8-Bay 2.5\"\u003c\/a\u003e covers 4-socket compute with modest local storage. Pay for both 4-socket and 24-bay only when both are genuine requirements.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eStorage - 24 SFF Bays\u003c\/h2\u003e\n\u003cp\u003eTwenty-four 2.5\" SAS\/SATA hot-swap bays across the front of the chassis. With the full 24-bay backplane populated, the chassis is dedicated to drive density; plan boot onto BOSS rather than consuming front bays (see the boot subsection below). The 24-bay configuration is built for the workload pattern where primary data lives locally on SSD rather than on a SAN.\u003c\/p\u003e\n\u003cp\u003eDrive options span the full 14th gen SFF portfolio: SAS SSDs in mixed-use and read-intensive endurance tiers (480 GB through 7.68 TB), SATA SSDs for cost-optimized roles, SAS HDDs at 10K and 15K for moderate-IOPS data, NVMe SSDs in specific bay positions (see the NVMe section below), and self-encrypting drive variants for compliance-regulated deployments. Per-drive-type mixing is supported subject to controller capability.\u003c\/p\u003e\n\u003cp\u003eRAID guidance at 24 SFF bays: RAID 6 is appropriate for capacity-optimized SAS or SATA SSD pools where rebuild windows on individual drive failure need to be tolerated; RAID 10 is appropriate for write-intensive workloads where the 50 percent capacity overhead is acceptable in exchange for write performance and shorter rebuild windows; RAID 50 or RAID 60 across multiple sub-pools balances rebuild scope against usable capacity. We discuss RAID layout in every 24-Bay quote.\u003c\/p\u003e\n\u003ch3\u003eBoot Drives\u003c\/h3\u003e\n\u003cp\u003eBOSS module for boot. Dual mirrored M.2 SATA SSDs on a dedicated PCIe card, hardware RAID 1, cold-swap. At 24 bays this is strongly recommended rather than optional: consuming two front bays for OS boot mirroring wastes meaningful storage capacity in a configuration that exists specifically for high-density local SSD. BOSS keeps the OS off the front bays, frees all 24 bays for data, and provides hardware-mirrored boot redundancy without consuming a RAID controller channel. Standard on our 24-Bay R840 quotes unless you specify otherwise.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eStorage Controllers at 24-Bay Scale\u003c\/h2\u003e\n\u003cp\u003eAt 24 SFF bays the storage controller decision matters more than at 8 bays: controller capability, RAID overhead, and write-cache sizing become primary design factors rather than secondary considerations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePERC H740P (8 GB NV cache, battery-backed).\u003c\/strong\u003e The standard production controller for the 24-Bay configuration. The 8 GB flash-backed write cache absorbs burst writes across the larger drive pool, and full hardware RAID 0\/1\/5\/6\/10\/50\/60 covers every layout discussed above. Right pick for traditional hardware RAID across 24 SAS SSDs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePERC H730P (2 GB cache, battery-backed).\u003c\/strong\u003e Supported on the 24-bay configuration, but the 2 GB cache is smaller than ideal for 24 SSDs under heavy write load. Acceptable for primarily read-heavy or moderate-write workloads; for write-intensive workloads the H740P is the better default.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHBA330 (pass-through HBA).\u003c\/strong\u003e For software-defined storage workloads (vSAN, Storage Spaces Direct, Ceph, ZFS) at 24-bay scale. No hardware RAID; clean SAS pass-through to the software layer. Multiple HBAs or specific backplane configurations may be required to present all 24 bays to the storage stack; we spec the right combination at quote time based on backplane configuration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePERC H330 (no cache).\u003c\/strong\u003e Entry-tier hardware RAID. Not appropriate as the primary controller for 24 write-active SSDs; mentioned only for completeness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe H740P NV cache is flash-backed rather than dependent on a battery wear item, which is one of the genuine 14th gen advantages over the 13th gen H730P lineage and matters most at this drive count where write-cache protection is effectively mandatory. The wrong controller choice at 24 bays produces measurable performance loss under load.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eNVMe at 24 Bays\u003c\/h2\u003e\n\u003cp\u003eThe R840 supports NVMe SSDs in specific front-bay positions with the right backplane and PCIe lane configuration. NVMe at high drive counts requires PCIe lane budget that competes with other expansion, so the NVMe-versus-SAS decision is made at the architecture level rather than as a drop-in choice. Common storage tiering patterns on the 24-Bay R840:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll SAS SSD (24 bays).\u003c\/strong\u003e The simplest PCIe planning and the right answer for most production workloads. Modern SAS SSD per-drive performance is high enough that the NVMe step-up is not required for the majority of database, analytics, and HCI deployments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMixed NVMe plus SAS\/SATA.\u003c\/strong\u003e A smaller number of NVMe drives as a high-bandwidth hot tier alongside bulk SAS\/SATA capacity. Appropriate when a specific portion of the dataset (database redo, HCI cache tier) genuinely needs NVMe latency and the rest does not.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor most production 24-Bay R840 workloads, all-SAS-SSD is the right answer: it simplifies PCIe planning meaningfully and delivers the IOPS the workload needs. If NVMe is a genuine workload requirement, we engineer the backplane, riser, and controller combination at quote time and confirm feasibility against the competing PCIe demand.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eProcessors\u003c\/h2\u003e\n\u003cp\u003eUp to four 2nd Generation Intel Xeon Scalable (Cascade Lake-SP) processors in the LGA 3647 Purley platform: up to 28 cores per CPU, up to 112 cores and 224 threads across four sockets. TDP ranges from the Gold 5000 series through the Platinum 8000 series, roughly 85W to 205W per CPU. As on the 8-Bay, production 24-Bay deployments are almost always 4-socket; the platform's value is the scale-up compute. The common production CPU choices are the same across the R840 family: Gold 6230 (20 cores, 125W) for balanced 80-core consolidation, Platinum 8260 (24 cores, 165W) for 96-core maximum performance, and Platinum 8280 (28 cores, 205W) for the 112-core ceiling.\u003c\/p\u003e\n\u003cp\u003eOne chassis-specific note: 24 active SSDs add meaningful thermal load alongside four high-TDP CPUs in 2U. On 205W Platinum builds paired with a full 24-drive backplane, confirm the high-performance heatsink option and validate inlet temperature, because the combined CPU and drive heat load is at the aggressive end of the 2U envelope. All four sockets must carry the same processor SKU; mixed-SKU population is not supported. For the full CPU SKU discussion shared across the platform, see the \u003ca href=\"\/products\/dell-poweredge-r840-8-bay-2-5-chassis\"\u003eR840 8-Bay 2.5\"\u003c\/a\u003e page.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eMemory\u003c\/h2\u003e\n\u003cp\u003e96 DDR4 DIMM slots: 24 per CPU socket, six channels per socket at 2 DIMMs per channel. Maximum capacity is 6 TB with 64 GB LRDIMMs across all 96 slots, the same memory architecture as the rest of the R840 family. Memory speed follows standard Cascade Lake population rules: DDR4-2933 capable DIMMs run at full rated speed at 1 DPC on supported Gold and Platinum SKUs, stepping down to DDR4-2666 at full 2 DPC population. RDIMM and LRDIMM cannot be mixed, and balanced symmetric population across all four sockets is required for optimum performance.\u003c\/p\u003e\n\u003cp\u003eOn the 24-Bay specifically, the memory configuration usually follows the storage-driven workload: SAP HANA builds size memory to the in-memory dataset and use the 24 bays for persistence, while Oracle and SQL builds size memory to the buffer pool and use the bays for datafiles, logs, and temp. Optane Persistent Memory is supported on the Cascade Lake L-series CPUs and is the right tool when the in-memory working set exceeds the 6 TB DRAM ceiling. Confirm L-series CPU selection at quote time if PMem is part of the design.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eNetworking and PCIe Expansion\u003c\/h2\u003e\n\u003cp\u003eDell Network Daughter Card (NDC) mezzanine for primary networking, which does not consume a PCIe expansion slot. NDC options include 4x 1 GbE, 2x 10 GbE plus 2x 1 GbE, 4x 10 GbE, and 2x 25 GbE. Most 24-Bay R840 deployments standardize on 10 GbE or 25 GbE given the workload class and the local-storage architecture.\u003c\/p\u003e\n\u003cp\u003ePCIe expansion is up to 8 PCIe Gen3 slots with all four CPUs populated, depending on riser configuration. On the 24-Bay variant the PCIe budget is more contested than on the 8-Bay, because NVMe backplane lanes (when used), storage HBAs for software-defined storage, and FC HBAs for any SAN tier all draw on the same slot and lane budget. We map the PCIe allocation explicitly at quote time so the storage controller, NVMe lanes, and networking all fit. If the design needs more simultaneous high-bandwidth cards than the 2U riser map can deliver alongside 24 bays, the 3U \u003ca href=\"\/products\/dell-poweredge-r940-24-bay-2-5-chassis\"\u003eR940 24-Bay 2.5\"\u003c\/a\u003e combines maximum SFF storage with more expansion slots.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eGPU Support\u003c\/h2\u003e\n\u003cp\u003eAs with the 8-Bay, the 24-Bay R840 supports selective GPU acceleration rather than primary GPU compute, and the 24-drive thermal load tightens the budget further. A limited number of single-width accelerators can ride alongside the CPU and storage workload for inference or analytics offload, but a full 24-drive backplane plus four high-TDP CPUs leaves little thermal and slot headroom for GPUs. If GPU compute is a primary requirement, a purpose-built GPU platform is the right answer rather than a storage-dense 4-socket scale-up server.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eManagement - iDRAC9 Generation\u003c\/h2\u003e\n\u003cp\u003eiDRAC9 Enterprise is the production management baseline and rarely optional on a 4-socket mission-critical platform. It delivers remote KVM, virtual media mounting, predictive analytics, Active Health System telemetry, and full Lifecycle Controller firmware management with OpenManage Enterprise integration. Silicon Root of Trust is standard: a hardware-anchored chain of trust verifying iDRAC firmware, BIOS, and bootloader against cryptographic measurements, which provides the documented platform-attestation evidence required by SOC 2, PCI DSS, HIPAA, and FedRAMP audits. TPM 2.0 is supported and recommended on every production build. On a 24-drive node, iDRAC9 drive-health telemetry and predictive failure alerting are particularly valuable, because the larger the drive population, the more the operational value of catching a degrading drive before it fails. NUMA topology visibility through iDRAC9 supports workload placement tuning across the four sockets, which is a standard part of SAP HANA and Oracle production deployment.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePower and Cooling\u003c\/h2\u003e\n\u003cp\u003eDell Flex Slot power supplies. A fully loaded R840 24-Bay with 4x Gold 6230 (125W each), 96 DIMMs, and 24 SAS SSDs draws roughly 1,500 to 2,000W at sustained peak; with 4x Platinum 8280 at 205W each and NVMe drives, the draw rises further. The 24 active drives add roughly 240W over the 8-Bay's storage draw, which pushes the platform firmly into the high-wattage tier. PSU sizing for this variant:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2x 1600W Platinum (minimum production redundancy).\u003c\/strong\u003e The floor for a production 24-Bay build. Provides 1+1 redundancy for lower-TDP 4-socket configurations with a full drive bay.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4x 1600W Platinum (typical for high-TDP 24-Bay).\u003c\/strong\u003e 2+2 redundancy, the standard choice when high TDP combines with production high availability. Most 24-Bay R840 builds at Platinum CPU tiers land here.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSingle-PSU operation is not appropriate for this variant: a 24-Bay R840 draws 1.5 to 2.0 kW sustained, which is not a production configuration on a single supply. Confirm rack power allocation and PDU circuit capacity before deployment. The thermal envelope is real at 24 drives plus four high-TDP CPUs in 2U; confirm rack cooling and inlet temperature for the specific CPU SKU and drive count. We validate thermal and power budgets, including PDU capacity, as part of every 24-Bay R840 quote.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePhysical Specs and Platform Notes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForm factor:\u003c\/strong\u003e 2U rack chassis, the same external height as the 8-Bay but carrying a 24-drive backplane in the front. Plan chassis depth and cable management arm clearance into the rack layout.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePCIe expansion:\u003c\/strong\u003e up to 8 PCIe Gen3 slots depending on riser configuration, with the budget more contested than on the 8-Bay once NVMe lanes and storage HBAs are accounted for.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParts availability:\u003c\/strong\u003e strong. 14th gen launched in 2018 and shares its processor, memory, controller, and PSU ecosystem with the high-volume R640 and R740, so component sourcing for both new and refurbished builds is abundant. Dell ProSupport remains available on the platform.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccessories we recommend:\u003c\/strong\u003e the BOSS boot card on every production build (effectively mandatory at 24 bays to preserve drive capacity), and the Dell ReadyRails sliding rail kit for racking. The matching rail kit for this chassis is the \u003ca href=\"\/products\/dell-poweredge-r840-static-ready-rail-kit-b15-n1d5c-0n1dc\"\u003eDell PowerEdge R840 2U B15 Sliding Ready Rail Kit\u003c\/a\u003e, which we can include on the quote.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlatform notes:\u003c\/strong\u003e the full 24-bay backplane dedicates the chassis front to drives (boot belongs on BOSS); all four sockets must carry identical CPU SKUs; full 96-DIMM population steps memory speed down one bin; and 24 active drives plus high-TDP CPUs require thermal validation against rack inlet temperature.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eOur Assessment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhere it excels:\u003c\/strong\u003e The R840 24-Bay is the right answer for the narrow set of workloads that genuinely need both 4-socket scale-up compute and high-density local SSD in one chassis. SAP HANA with a large local SSD persistence layer that keeps log and savepoint traffic off the SAN. Oracle with local ASM diskgroups where the team has standardized on local SSD rather than SAN. SQL Server Enterprise with tempdb and transaction logs on local SSD behind SAN datafiles. High-density vSAN ReadyNode or Storage Spaces Direct consolidation where fewer, larger 4-socket nodes reduce per-socket licensing and rack footprint. These are the deployments where 4-socket plus 24 bays earns the premium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere to look instead:\u003c\/strong\u003e If 8 SFF bays is enough alongside 4-socket compute, the \u003ca href=\"\/products\/dell-poweredge-r840-8-bay-2-5-chassis\"\u003eR840 8-Bay 2.5\"\u003c\/a\u003e is the lower-cost configuration of the same platform. If dual-socket compute is sufficient with 24 bays, the \u003ca href=\"\/products\/dell-poweredge-r740xd-24-bay-2-5-chassis\"\u003eR740xd 24-Bay 2.5\"\u003c\/a\u003e delivers the storage density at materially lower cost. If you need 24 bays plus more PCIe expansion than the 2U chassis allows, the 3U \u003ca href=\"\/products\/dell-poweredge-r940-24-bay-2-5-chassis\"\u003eR940 24-Bay 2.5\"\u003c\/a\u003e is the answer, and the \u003ca href=\"\/products\/dell-poweredge-r940-8-bay-2-5-chassis\"\u003eR940 8-Bay 2.5\"\u003c\/a\u003e covers the expansion-first case with fewer bays. HPE shops at the equivalent 4-socket 2U tier should look at the \u003ca href=\"\/products\/server-design-lab-hpe-dl560-g10-24-bay-2-5-drives\"\u003eHPE ProLiant DL560 Gen10 24-Bay 2.5\"\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBottom line:\u003c\/strong\u003e The R840 24-Bay is one of the most specialized configurations in the 14th gen Dell portfolio. Every component (the four sockets, the 24 bays, and the PCIe budget that serves them) needs to be justified by the workload; if any one of them is more than you need, a simpler configuration delivers better economics. For the customer who has confirmed both the 4-socket compute requirement and the high-density local SSD requirement, this is the chassis that delivers both in 2U, validated and burned in, under warranty, at a refurbished price point well below the current-generation equivalent. That is the configuration to put in the procurement justification, alongside the workload that requires it.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhere the R840 Fits in 2026\u003c\/h2\u003e\n\u003cp\u003eThe R840 is the 14th gen 4-socket platform, launched in 2018 on Intel Purley with a Cascade Lake refresh in 2019. It sits two generations behind the 15th gen Ice Lake platforms and three behind the 16th gen Sapphire Rapids and Emerald Rapids platforms, and Dell did not carry the 4-socket-in-2U envelope forward in the same form in later generations. For the 24-Bay variant specifically, that makes it a distinctive way to get 4-socket compute plus high-density local SSD in 2U at a mature, well-understood price point.\u003c\/p\u003e\n\u003cp\u003eWhat is specific to this variant in 2026: the workloads it serves (HANA with local persistence, Oracle on local ASM, SQL consolidation, dense HCI) have not fundamentally changed, the component ecosystem is abundant, and the per-core and per-drive acquisition cost is meaningfully below the current generation for the same envelope. For organizations extending existing 14th gen estates with a storage-dense 4-socket node, the 24-Bay R840 delivers genuine production work at significantly reduced cost. It is not the newest platform and it is not obsolete; it is the correct tool for a specific storage-dense scale-up pattern when budget is a meaningful design constraint.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eHonest Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized configuration, narrow fit.\u003c\/strong\u003e Buy the 24-Bay only when both 4-socket compute and high-density local SSD are genuine requirements. If either is more than the workload needs, the 8-Bay R840 or the dual-socket R740xd 24-Bay is the better-economics answer.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage controller choice matters more at 24 bays.\u003c\/strong\u003e The H730P (2 GB cache) is supported but undersized for write-intensive workloads across 24 SSDs. The H740P (8 GB NV cache) is the standard recommendation; the wrong controller produces measurable performance loss under load.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNVMe at scale is PCIe-budget-limited.\u003c\/strong\u003e NVMe beyond a modest hot tier competes with storage HBAs, FC HBAs, and networking for the same PCIe lanes. We engineer this carefully at quote time; it is not a drop-in choice.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-PSU operation is not appropriate.\u003c\/strong\u003e The 24-Bay draws 1.5 to 2.0 kW sustained. Take redundant PSUs (2x or 4x 1600W) on every production build.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull 96-DIMM population drops memory speed one bin.\u003c\/strong\u003e DDR4-2933 capable DIMMs run at DDR4-2666 at full 2 DPC. For HANA or bandwidth-sensitive workloads, populate at 1 DPC and accept the lower capacity ceiling.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e24 drives plus high-TDP CPUs require thermal validation.\u003c\/strong\u003e The combined heat load of a full backplane and four 205W Platinum CPUs in 2U is at the aggressive end of the envelope. Confirm inlet temperature, rack cooling, and PDU sizing before deployment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e14th gen generational caveats apply.\u003c\/strong\u003e PCIe Gen3 rather than Gen4, a DDR4-2933 ceiling, and iDRAC9 rather than the newer management generation. Expected for the platform's age, not defects, but real if your requirement is current-generation I\/O bandwidth.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWorkload Fit\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eThis server is right for\u003c\/th\u003e\n    \u003cth\u003eConsider alternatives for\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e✅ SAP HANA with large local SSD persistence layer\u003c\/td\u003e\n    \u003ctd\u003e❌ 8 SFF bays sufficient alongside 4-socket (use R840 8-Bay)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e✅ Oracle Database with local ASM diskgroups\u003c\/td\u003e\n    \u003ctd\u003e❌ Dual-socket sufficient with 24 bays (use R740xd 24-Bay)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e✅ SQL Server Enterprise with local tempdb and logs\u003c\/td\u003e\n    \u003ctd\u003e❌ SAN-only storage architecture (use R840 8-Bay)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e✅ High-density vSAN ReadyNode at 4-socket scale\u003c\/td\u003e\n    \u003ctd\u003e❌ Need more PCIe expansion (use R940 24-Bay)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e✅ In-memory analytics with large local hot tier\u003c\/td\u003e\n    \u003ctd\u003e❌ Budget-constrained projects\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e✅ Storage Spaces Direct (S2D) at 4-socket scale\u003c\/td\u003e\n    \u003ctd\u003e❌ Primary GPU compute workloads\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eWhere to Look Instead\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8 SFF bays sufficient alongside 4-socket compute?\u003c\/strong\u003e The \u003ca href=\"\/products\/dell-poweredge-r840-8-bay-2-5-chassis\"\u003eR840 8-Bay 2.5\"\u003c\/a\u003e is the same 4-socket platform at lower cost when the local storage requirement is modest.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-socket sufficient with 24 bays?\u003c\/strong\u003e The \u003ca href=\"\/products\/dell-poweredge-r740xd-24-bay-2-5-chassis\"\u003eR740xd 24-Bay 2.5\"\u003c\/a\u003e delivers 24-bay SFF capacity at the dual-socket tier for materially lower cost.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeed 24 bays plus more PCIe expansion?\u003c\/strong\u003e The \u003ca href=\"\/products\/dell-poweredge-r940-24-bay-2-5-chassis\"\u003eR940 24-Bay 2.5\"\u003c\/a\u003e is the 3U platform combining maximum SFF storage with more slots, and the \u003ca href=\"\/products\/dell-poweredge-r940-8-bay-2-5-chassis\"\u003eR940 8-Bay 2.5\"\u003c\/a\u003e covers the expansion-first case with fewer bays.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHPE shop at the same 4-socket 2U tier?\u003c\/strong\u003e The \u003ca href=\"\/products\/server-design-lab-hpe-dl560-g10-24-bay-2-5-drives\"\u003eHPE ProLiant DL560 Gen10 24-Bay 2.5\"\u003c\/a\u003e is the HPE counterpart, same generation and equivalent positioning.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRacking the server?\u003c\/strong\u003e The \u003ca href=\"\/products\/dell-poweredge-r840-static-ready-rail-kit-b15-n1d5c-0n1dc\"\u003eR840 2U B15 Sliding Ready Rail Kit\u003c\/a\u003e is the matching rail kit for this chassis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eReady to Configure?\u003c\/h2\u003e\n\u003cp\u003e24-Bay R840 configurations are specialized enough that we recommend a design conversation before hardware selection. Tell us the workload (SAP HANA, Oracle, SQL Server, vSAN, analytics, or S2D), the licensing context, the CPU and core target, the memory target including any Optane Persistent Memory requirement, the storage architecture (drive type mix, RAID layout, NVMe requirement), controller preference, PSU redundancy preference, PCIe expansion requirements, and quantity. We respond within 24 hours with a validated configuration including thermal, power-budget, and PCIe-budget confirmation. Every refurbished unit ships with the Wholesale Servers 180-day warranty and 12+ hour burn-in testing, and volume pricing starts at 5 units. Call 1-800-778-1545 or use the quote form below.\u003c\/p\u003e","brand":"Dell","offers":[{"title":"Default Title","offer_id":45951275303111,"sku":"BP-011942","price":3600.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/4493\/0247\/files\/server-design-lab-dell-poweredge-r840-24-bay-25-drives-496897.png?v=1765539695","url":"https:\/\/wholesaleservers.com\/products\/dell-poweredge-r840-24-bay-2-5-chassis","provider":"Wholesale Servers","version":"1.0","type":"link"}