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400-ATJM — Storage Datasheet

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EMC · STORAGE_HDD · 2.5_SAS_HDD
WHAT YOU NEED TO KNOW
SAS backplane accepts SATA drives (not vice versa) Buy with tray when possible — saves cost vs separate tray
ALWAYS ASK: "Does it come with tray/caddy?"
PRODUCT OVERVIEW

Increase the storage capacity of your system with the 1.2TB Hard Drive from Dell. Key specifications include Type: HDD, HDD size: 2.5", Hot-swap: Yes, HDD speed: 10000 RPM, Interface: SAS, HDD capacity: 1.2 TB. The unit ships in a SFF form factor suitable for standard rack-mount installations.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
STORAGE_HDD→ 2.5_SAS_HDD→ SFF BAY→ 400-ATJM
SPECIFICATIONS
TypeHDD
HDD size2.5"
Hot-swapYes
HDD speed10000 RPM
InterfaceSAS
HDD capacity1.2 TB
Component forServer/workstation
Bytes per sector512n
Operating voltage5 V
Storage drive adapter type2.5" - 3.5"
HDD interface transfer rate12 Gbit/s
Harmonized System (HS) code84717050
COMPONENT DIAGRAM
LATCH 1.2TB SAS — 400-ATJM SAS CONN WITH TRAY — HOT-PLUG READY Tray: See server gen 1.2TB SAS — 400-ATJM BARE DRIVE — NO LATCH Needs caddy/tray to install 2.5" (70 x 100mm) SFF 2.5" DRIVE | 1.2TB | SAS — Always ask: "Does it come with tray/caddy?" | Tray PN varies by server generation TITLE SFF 2.5" DRIVE PN 400-ATJM CAP 1.2TB SAS
KEY FEATURES
•
SFF Form Factor
•
1.2TB Capacity
TYPICAL APPLICATIONS
  • Enterprise storage arrays and SANs
  • Direct-attached storage (DAS) expansion
  • Database tier storage (OLTP, OLAP)
  • Virtual machine datastore expansion
  • Backup-to-disk and disaster recovery targets
  • Content delivery and media streaming storage
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
400-BFWYCompatible
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - SPN - Gen 14
compatible
401-ABHMCompatible
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - DPN - Gen 14
compatible
K41G1Compatible
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - MPN - Gen 14
compatible
W1DGHCompatible
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - MPN - Gen 14
compatible
YMVPPCompatible
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - MPN - Gen 14
compatible
01M0DCompatible
Dell 1.2Tb SAS 12G 10K SFF 512n HDD - APN
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 6
K41G1SUBSTITUTE
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - DPN - Gen 14
DELL
W1DGHSUBSTITUTE
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - DPN - Gen 14
DELL
YMVPPSUBSTITUTE
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - DPN - Gen 14
DELL
400-ATJNSUBSTITUTE
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - DPN - Gen 14
DELL
400-BFWYSUBSTITUTE
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - DPN - Gen 14
DELL
401-ABHMSUBSTITUTE
Dell 1.2Tb SAS 12G 10K SFF 512n HDD in LFF R/T-Series Tray - DPN - Gen 14
DELL
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FREQUENTLY ASKED QUESTIONS
What is 400-ATJM?
400-ATJM is a DELL 400-ATJM internal hard drive 1.2 TB 10000 RPM 2.5" SAS manufactured by EMC. It is classified as a STORAGE_HDD (2.5_SAS_HDD).
What parts can replace 400-ATJM?
There are 12 known substitutes for 400-ATJM: 400-BFWY, 401-ABHM, K41G1 and 9 more. Substitute compatibility should be verified for your specific system.
Is 400-ATJM still available?
400-ATJM is currently Unknown.
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Last verified: September 2026