400-AJPD: Dell 1.2TB 10K RPM SAS 12Gb/s 2.5-inch Hot-Plug Hard Drive
Also listed as: 01PX79, 1PX79, ST1200MM0088 · made by Seagate
The Dell 400-AJPD is a Dell 1.2TB 10K RPM SAS 12Gb/s 2.5-inch Hot-Plug Hard Drive delivering 1200GB of rotational storage at 10000 rpm over SAS 12Gb/s in a 2.5-inch SFF hot-plug carrier. Manufactured by Seagate, the 400-AJPD provides dependable bulk storage for Dell R730, R630, R740, R640 enterprise servers.
Specifications
| Part number | 400-AJPD |
|---|---|
| Brand | Dell |
| Made by | Seagate |
| Type | Hard drives |
| Other numbers | 01PX79, 1PX79, ST1200MM0088 |
| Status | end of sale |
| Capacity (GB) | 1,200 |
| Interface | SAS 12Gb/s |
| Form factor | 2.5-inch SFF hot-plug |
| Spindle speed rpm | 10,000 |
| Sector format | 512n native |
About the 400-AJPD
The Dell 400-AJPD is a Dell 1.2TB 10K RPM SAS 12Gb/s 2.5-inch Hot-Plug Hard Drive offering 1200GB of rotational enterprise storage operating at 10000 rpm over SAS 12Gb/s in a 2.5-inch SFF hot-plug format. Built with multi-platter mechanical assemblies from Seagate, the 400-AJPD provides dependable sequential throughput and 24/7 duty-cycle durability. In Dell's storage portfolio, 400-AJPD delivers economical storage capacity for secondary storage tiers, backup targets, and media streaming pools.
Compatibility
The 400-AJPD is compatible exclusively with 2.5-inch small form factor drive bays across Dell servers including R730, R630, R740, R640. The 400-AJPD mounts inside a DXD9H (14G–16G) hot-plug drive carrier and requires a SAS or SATA controller matching its SAS 12Gb/s specification. Part 400-AJPD cannot be installed into 3.5-inch drive bays without an approved mechanical adapter bracket.
How to identify a genuine unit
Genuine 400-AJPD units feature a Dell enterprise drive label displaying DP/N 01PX79, 1200GB capacity, 10000 rpm rotational speed, and Seagate model markings ST1200MM0088. In iDRAC under Physical Disks, the 400-AJPD registers with certified Dell firmware, active SMART diagnostics, and spindle temperature monitoring. The DXD9H (14G–16G) carrier for 400-AJPD includes status and activity indicator light pipes.
Buying used
When evaluating a pre-owned 400-AJPD, 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-AJPD to verify smooth bearing rotation without head-parking noise. Ensure the correct DXD9H (14G–16G) caddy is supplied with the 400-AJPD.
Fits these models
- Dell PowerEdge R730
- Dell PowerEdge R630
- Dell PowerEdge R740
- Dell PowerEdge R640
- Dell PowerVault MD1420
- Dell PowerVault MD1220
Equivalent part numbers
- Seagate Enterprise Performance 10K Seagate ST1200MM0088 1.2TB 10K SAS HDD
FAQ
What sector size does the 400-AJPD use?
512n (native 512-byte sectors), ensuring full compatibility with legacy hypervisors and OS installations.
What interface speed does it support?
12Gb/s SAS, with backward compatibility to 6Gb/s SAS controllers.
Buying or selling 400-AJPD?
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 1.2TB 10K SAS HDD Product Details, checked 2026-10-27