400-AUQW: Dell 4TB 7.2K RPM SAS 12Gb/s 512e 3.5in Hot-Plug Hard Drive
Also listed as: 00F9W8, 0F9W8, ST4000NM0025, HUS726T4TAL5204 · made by Seagate
The Dell 400-AUQW is a Dell 4TB 7.2K RPM SAS 12Gb/s 512e 3.5in Hot-Plug Hard Drive delivering 4000GB of rotational storage at 7200 rpm over SAS 12Gb/s in a LFF 3.5in carrier. Manufactured by Seagate, the 400-AUQW provides dependable bulk storage for Dell R730XD, R740XD, R540, MD1200 enterprise servers.
Specifications
| Part number | 400-AUQW |
|---|---|
| Brand | Dell |
| Made by | Seagate |
| Type | Hard drives |
| Other numbers | 00F9W8, 0F9W8, ST4000NM0025, HUS726T4TAL5204 |
| Status | current |
| Capacity (GB) | 4,000 |
| Interface | SAS 12Gb/s |
| Form factor | LFF 3.5in |
| Speed | 7200 rpm |
| Endurance | 550 TB/year workload rating |
About the 400-AUQW
The Dell 400-AUQW is a Dell 4TB 7.2K RPM SAS 12Gb/s 512e 3.5in Hot-Plug Hard Drive offering 4000GB of rotational enterprise storage operating at 7200 rpm over SAS 12Gb/s in a LFF 3.5in format. Built with multi-platter mechanical assemblies from Seagate, the 400-AUQW provides dependable sequential throughput and 24/7 duty-cycle durability. In Dell's storage portfolio, 400-AUQW delivers economical storage capacity for secondary storage tiers, backup targets, and media streaming pools.
Compatibility
The 400-AUQW installs directly into 3.5-inch large form factor hot-plug bays across Dell enterprise systems including R730XD, R740XD, R540, MD1200. The 400-AUQW mounts inside a X7K8W (14G–16G) drive tray and connects to onboard SATA ports or PERC controllers supporting SAS 12Gb/s. Part 400-AUQW is formatted for 3.5-inch large form factor slots and is not compatible with 2.5-inch SFF chassis drive bays.
How to identify a genuine unit
Genuine 400-AUQW units feature a Dell enterprise drive label displaying DP/N 00F9W8, 4000GB capacity, 7200 rpm rotational speed, and Seagate model markings ST4000NM0025. In iDRAC under Physical Disks, the 400-AUQW registers with certified Dell firmware, active SMART diagnostics, and spindle temperature monitoring. The X7K8W (14G–16G) carrier for 400-AUQW includes status and activity indicator light pipes.
Buying used
When evaluating a pre-owned 400-AUQW, check SMART logs via OpenManage or smartctl to verify zero reallocated sectors (attribute 0x05) and zero pending defects (attribute 0xC5). Check power-on hours and execute an extended drive self-test on the 400-AUQW to verify smooth bearing rotation without head-parking noise. Ensure the correct X7K8W (14G–16G) caddy is supplied with the 400-AUQW.
Fits these models
- Dell PowerEdge R730xd
- Dell PowerEdge R740xd
- Dell PowerEdge R540
- Dell PowerVault MD1200
- Dell PowerVault MD1400
- Dell PowerVault ME4012
Check compatibility with Dell
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Dell has tested with the Dell 400-AUQW.
- Compatibility Dell E-Lab Navigator (storage and SAN interoperability) (free vendor sign-in)
- Support Dell Support: drivers, manuals and service tag lookup
Equivalent part numbers
- Seagate ST4000NM0025 Seagate Enterprise Capacity 4TB SAS HDD OEM base
Buying or selling 400-AUQW?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Dell 4TB 7.2K RPM SAS Hard Drive Specifications, checked 2026-10-27