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304859-B21 — DISK DRIVE UNIT

✓ Government record, cited
— · STORAGE_HDD · 3.5_SATA_HDD
PRODUCT OVERVIEW

304859-B21: DISK DRIVE UNIT.

The DISK DRIVE UNIT is a the manufacturer hard disk drive designed for enterprise environments demanding consistent performance and data integrity. Key specifications include design_type: HARD DISK, unit_design: INTERNAL, special_features: 4.3 GB. WIDE-ULTRA SCSI-3 10,000 RPM DRIVE GB, data_storage_capacity: 4.30 GIGABYTES.

This part is cataloged in the U.S. Government catalog under NSN 7025-01-476-5736, indicating validated use in U.S. government and defense logistics supply chains.

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→ 3.5_SATA_HDD→ 304859-B21
NSN: 7025-01-476-5736
FSC: 7025 — Information Technology Input/output and Storage Devices
CAGE: 65685 — COMPAQ COMPUTER CORP. (USA)
SPECIFICATIONS
design_typeHARD DISK
unit_designINTERNAL
special_features4.3 GB. WIDE-ULTRA SCSI-3 10,000 RPM DRIVE GB
data_storage_capacity4.30 GIGABYTES
NSN7025-01-476-5736
COMPONENT DIAGRAM
RELEASE LATCH — NL-SAS 7.2K 304859-B21 OEM NL-SAS INTERFACE INTERPOSER SAS drive in SATA tray? Check board compatibility 3.5" (101.6 x 146mm) LFF 3.5" DRIVE | — | NL-SAS 7.2K 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 304859-B21 MFR OEM
KEY FEATURES
•
DESIGN TYPE: HARD DISK
•
DATA STORAGE CAPACITY: 4.30 GIGABYTES
•
UNIT DESIGN: INTERNAL
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
TECHNICAL CHARACTERISTICS
DESIGN TYPEHARD DISK
SPECIAL FEATURES4.3 GB. WIDE-ULTRA SCSI-3 10,000 RPM DRIVE GB
DATA STORAGE CAPACITY4.30 GIGABYTES
UNIT DESIGNINTERNAL
OTHER ITEMS IN FSC 7025 — Information Technology Input/output and Storage Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
7025-00-001-2681 7025-00-001-5588 7025-00-001-6998 7025-00-001-6999 7025-00-001-7000 7025-00-001-7025 7025-00-001-7026 7025-00-001-7027
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 304859-B21?
304859-B21 is a DISK DRIVE UNIT. It is classified as a STORAGE_HDD (3.5_SATA_HDD).
What is the NSN for 304859-B21?
304859-B21 is cataloged in the U.S. Government catalog under NSN 7025-01-476-5736. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.