HPE Proliant DL360 G9 4-Bay 3.5"

The HPE ProLiant DL360 Gen10 4-Bay 3.5" is the only 1U LFF configuration in the Gen10 lineup - four large-format 3.5" hot-swap bays in the same compact 1U chassis as the SFF DL360 variants, with full dual-socket Xeon Scalable compute. This is the platform for edge computing nodes, branch office servers, and remote site deployments that need bulk local storage capacity without stepping to 2U. Four 20 TB NL-SAS drives delivers 80 TB raw in a 1U footprint, which is meaningful capacity for edge and branch deployments where rack space is constrained and bulk local storage is a real requirement.

This is a sibling page to the DL360 Gen10 10-Bay 2.5" canonical. The full platform vocabulary - Purley socket support, memory architecture, controller comparisons, iLO 5 with Silicon Root of Trust, FlexibleLOM networking, generational positioning - lives on that page and applies identically here. This page focuses on what's specific to the 4-Bay 3.5" configuration: when 1U LFF is the right call, how 4 large-format bays map to common edge and branch workloads, and the cost-versus-flexibility decision against the 2U DL380 Gen10 12-Bay LFF.

To 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.

When 1U LFF Is the Right Configuration

The DL360 Gen10 4-Bay 3.5" fills a specific niche: you need LFF bulk storage capacity, and 1U is a hard requirement. The only other path to LFF drives in 1U from HPE is the DL160 Gen10 (also 4-Bay LFF, but lower-spec compute - single-CPU or limited dual-CPU, fewer DIMM slots, more entry-tier overall). If 2U is acceptable, the DL380 Gen10 12-Bay 3.5" delivers three times the LFF bays with the same compute platform and meaningful per-bay cost savings - that's almost always the better answer when 2U fits.

The DL360 4-Bay 3.5" is the right call specifically when:

• Edge computing nodes. Full DL360 enterprise compute (dual-socket Xeon Scalable, 24 DIMM slots, iLO 5 management) alongside 4 LFF drives for local bulk storage, in a 1U footprint that fits constrained edge racks. For retail back-of-store deployments, manufacturing floor compute, or cell tower edge sites, the combination of real server-class compute and meaningful local storage in 1U is genuinely useful.
• Branch office file servers. 4x 12 TB or 4x 16 TB NL-SAS in RAID 6 gives 24-32 TB usable for branch NAS, file server, or Active Directory integrated storage at remote sites. The 1U footprint matters at branch sites where rack space is at a premium and shipping a 2U server to every branch isn't worth the cost.
• Remote backup targets. Veeam-style remote backup repositories or Active Directory-replicated DFS shares at remote sites. 4 large-capacity NL-SAS drives, 12+ hour burn-in tested, with iLO 5 for remote troubleshooting when there's no on-site IT staff. The reliability profile and remote management matter as much as the capacity here.
• Distributed Ceph capacity-tier nodes. If you're running a Ceph cluster across many small edge sites and need 4 large NL-SAS OSDs per site in 1U, this is the platform. Per-site compute headroom is full DL360 dual-socket capacity, which is plenty for the OSD daemon load.

Storage - 4 LFF Bays

Four 3.5" SAS/SATA hot-swap bays. Drive options span the full LFF portfolio:

• NL-SAS HDDs for bulk capacity. The mainstream pick. 4 TB, 8 TB, 12 TB, 16 TB, and 20 TB capacities. NL-SAS gives you full SAS protocol on bulk drives - end-to-end checksums, dual-port active-active capability, and queue depth advantages over SATA NL drives.
• SAS HDDs at 10K and 15K RPM. Moderate-IOPS workloads where you want some performance alongside capacity. 10K SAS at 1.2-1.8 TB or 15K SAS at 600 GB-1.2 TB. The economics rarely justify these in LFF over SAS SSDs for performance, but the option exists for shops standardized on 10K LFF SAS.
• SAS or SATA SSDs in LFF carriers. For workloads needing flash performance in LFF form factor. Possible but usually not the right answer - if you need SSDs, the SFF variants (8-Bay or 10-Bay 2.5") deliver better drive density per chassis and lower per-GB cost for SSD storage.

RAID at 4 Drives

RAID at low drive counts is its own conversation, and the 4-Bay configuration is the rare case where it's actually worth thinking carefully:

• RAID 6 (2 drives parity). 2 drives usable from 4 - 50% of raw. Two-drive fault tolerance, which matters at 16+ TB drive sizes because rebuild times after a failure are long and the probability of a second failure during rebuild is non-trivial. The capacity penalty is significant but the reliability is worth it for production data on large drives.
• RAID 10 (mirroring + striping). 2 drives usable from 4 - 50% of raw. Better write performance than RAID 6, faster rebuilds (single-drive copy versus parity reconstruction), still one-drive fault tolerance per mirror pair. Often the right choice when write performance matters and the capacity is sufficient.
• RAID 5 (1 drive parity). 3 drives usable from 4 - 75% of raw. Single-drive fault tolerance, which is the controversial part: industry consensus has moved away from RAID 5 on large drives because rebuild times leave the array vulnerable to a second failure for too long. At 12+ TB drive sizes specifically, RAID 5 is genuinely risky. At smaller drives (4-8 TB) and for less-critical data with off-site backup, it's defensible.

For most 4-bay deployments with large NL-SAS drives, we recommend RAID 6 even with the 50% capacity penalty. The reliability margin is worth the storage. RAID 10 is the right call when write performance is the dominant requirement. RAID 5 is a discussion to have at quote time only - we'll walk through your specific risk tolerance and capacity needs.

Boot Drives

Strongly recommend the HPE M.2 enablement kit for boot, freeing all 4 LFF bays for data. At 4 bays, consuming 2 of them for a RAID 1 OS mirror is a real capacity hit (50% of raw lost to OS alone before any data RAID overhead). The M.2 kit mounts in a PCIe slot, takes a SATA M.2 drive at 480 GB or larger, and leaves the 4 LFF bays entirely available for the workload's data tier.

Storage Controllers

Same options as the rest of the DL360 Gen10 family. The 10-Bay canonical covers the full Smart Array Gen10 portfolio in detail. For 4-Bay LFF NL-SAS workloads specifically:

• Smart Array P408i-a SR (2 GB FBWC): The right pick for NL-SAS RAID 6 production data. The 2 GB cache is appropriately sized for the write patterns 4 NL-SAS drives produce. FBWC battery is a wear item with roughly 5-year service life - disclosed on every build.
• Smart Array E208i-a SR (HBA mode): For Ceph OSD nodes at the edge, ZFS-based appliances, or any software-defined storage layer where you want direct drive visibility.
• S100i SR (software RAID): Boot drive only, not appropriate for production data.

P816i-a is overkill at 4 drives - its 4 GB cache and tri-mode capabilities address bottlenecks that don't exist at this drive count. P408i-a is the right answer.

Compute, Memory, Networking

Identical to the rest of the DL360 Gen10 family: dual-socket LGA 3647 Purley, Skylake-SP and Cascade Lake-SP supported, 24 DDR4 DIMM slots, up to 3 TB LRDIMM, HPE Smart Memory required for rated DDR4-2666 or DDR4-2933 operation. iLO 5 with Silicon Root of Trust standard, FlexibleLOM mezzanine for primary networking, 3 PCIe Gen3 slots. The 4-Bay 3.5" chassis doesn't change any of this - it's the bay configuration that's different, not the platform.

For edge deployments specifically, the iLO 5 remote management capability is the feature that earns its keep. Remote KVM, virtual media for OS installation, hardware health telemetry, and full power control over the dedicated iLO management network port means you can fully manage a branch-office server from headquarters without ever sending IT staff on-site. This is the operational lever that makes edge deployments practical at scale - and the reason the DL360 4-Bay 3.5" earns its place over consumer or workstation-class hardware at remote sites.

The 1U LFF vs. 2U LFF Decision

If 2U is acceptable, the DL380 Gen10 12-Bay 3.5" delivers three times the LFF bays in the same processor and memory platform. The economics almost always favor the DL380 12-Bay at sites where rack space accommodates 2U: more capacity, more RAID flexibility (RAID 6 at 12 drives is 10 drives usable - 83% of raw, versus the 4-Bay's 50%), and per-bay cost that's meaningfully lower at scale.

The DL360 4-Bay 3.5" wins specifically when 1U is the hard constraint - rack space at the edge or branch site is the design driver, and the 4-bay capacity ceiling is acceptable. If you're not constrained to 1U, the DL380 12-Bay is the better answer almost every time.

Workload Fit

Honest Limitations

Same generational caveats as the rest of the DL360 Gen10 family - PCIe Gen3, DDR4 memory speed ceilings, 1U thermal constraints on top-bin Platinum CPUs, FBWC battery as a wear item, iLO Advanced licensing typically separate on refurbished units. The 10-Bay canonical covers each in detail.

Plus one specific to the 4-Bay LFF configuration: the bay count itself is the binding constraint. Four bays at 50% RAID 6 capacity gives 2 drives usable - meaningful but limited. If your storage requirements grow beyond what 4 LFF bays at RAID 6 can serve, the path forward is replacing the chassis, not adding bays. Size the build with growth in mind, or accept that this is a fixed-capacity deployment.

Where to Look Instead

• 2U acceptable for more LFF bays? → DL380 Gen10 12-Bay 3.5" - 3x the bays, same compute platform
• SFF SSDs in 1U instead of LFF HDDs? → DL360 Gen10 10-Bay 2.5" (canonical)
• Need 8 SFF bays in 1U? → DL360 Gen10 8-Bay 2.5"
• Lower-spec compute alongside LFF storage? → DL160 Gen10 4-Bay 3.5" (entry-tier 1U LFF, lower CPU/memory ceiling)

Ready to Configure?

Tell us the workload, capacity target, CPU SKU preference, memory capacity, RAID preference at 4 drives, network topology and FlexibleLOM choice, and quantity. We respond within 24 hours, every refurbished unit ships with the Wholesale Servers 180-day warranty and 12+ hour burn-in, and volume pricing starts at 5 units. Call 1-800-778-1545 or use the quote form below.