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861683-K21 — Storage Datasheet

HPE · DRIVE LFF
WHAT YOU NEED TO KNOW
SAS backplane supports SATA, not vice versa NL-SAS = SAS protocol at nearline (7.2K) speed — NOT SATA
Gen8 LFF tray ≠ Gen10 tray — different screw holes
PRODUCT OVERVIEW

HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD. The unit ships in a LFF 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
LFF BAY→ 861683-K21
SPECIFICATIONS
Part Number861683-K21
ManufacturerHPE
Form FactorLFF
Capacity4TB
Speed7.2K RPM
BROWSE HPE MACHINES
ProLiant DL360 Gen10 ProLiant DL380 Gen10 ProLiant BL460c Gen10 ProLiant DL380 Gen9 ProLiant DL360 Gen9 3PAR StoreServ 8450 ProLiant BL685c G7 3PAR StoreServ 8400 3PAR StoreServ 8440 3PAR StoreServ 8200 MSA 2052 SAN Storage ProLiant BL460c Gen9
All HPE machines and parts
COMPONENT DIAGRAM
RELEASE LATCH 4TB NL-SAS 7.2K RPM 861683-K21 HPE NL-SAS INTERFACE INTERPOSER SAS drive in SATA tray? Check board compatibility 3.5" (101.6 x 146mm) LFF 3.5" DRIVE | 4TB | NL-SAS 7.2K RPM NL-SAS uses SAS protocol at 7.2K RPM | SAS backplane supports SATA, not reverse Tray generation matters | Gen8 LFF tray differs from Gen10 TITLE LFF 3.5" DRIVE PN 861683-K21 MFR HPE
KEY FEATURES
•
LFF Form Factor
•
4TB Capacity
•
7.2K RPM Speed
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
SUBSTITUTES & CROSS-REFERENCES 12
861683-B21CompatiblePARTNER
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD
compatible
862133-001CompatiblePARTNER
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD
compatible
861683-H21CompatiblePARTNER
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD
compatible
861683-X21CompatiblePARTNER
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD
compatible
846522-004CompatiblePARTNER
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF HDD - Bare Drive
compatible
872293-002CompatiblePARTNER
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF HDD - Bare Drive
compatible
LIFECYCLE

No lifecycle data available.

THIS PART SUBSTITUTES FOR 4
861683-B21SUBSTITUTE
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD
HPE
861683-H21SUBSTITUTE
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD
HPE
861683-X21SUBSTITUTE
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD
HPE
862133-001SUBSTITUTE
HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD
HPE
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FREQUENTLY ASKED QUESTIONS
What is 861683-K21?
861683-K21 is a HP 4Tb SATA 6G 7.2K 512n Digitally Signed MDL LFF LP HDD manufactured by HPE.
What parts can replace 861683-K21?
There are 12 known substitutes for 861683-K21: 861683-B21, 862133-001, 861683-H21 and 9 more. Substitute compatibility should be verified for your specific system.
Is 861683-K21 still available?
861683-K21 is currently Unknown.
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PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.