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785099-B21 ✓ Verified by PartsTable
HP · STORAGE_HDD · 2.5_SAS_HDD
WHAT YOU NEED TO KNOW
SAS HDD backplane accepts SATA drives, SATA backplane does NOT accept SAS 2.5" SAS HDDs come with or without carrier/tray — ALWAYS ASK
ALWAYS confirm carrier/tray PN — server-specific trays vary by generation
PRODUCT OVERVIEW
HP 300GB 12G SAS 15K 2.5IN ENT HDD

HP SAS Enterprise and Midline hard drives deliver high performance solutions for hosting high transaction based applications. Available in HP hot plug carriers or non-hot plug. HP SAS Enterprise and Midline hard drives come in both 2.5-inch (SFF) and 3.5-inch (LFF) industry standard form factors and are available in a variety of capacity points to meet a wide range of requirements.

The SAS interface was designed and engineered for high availability, enterprise-class data storage where performance, reliability and data integrity are crucial.<br /><br /><b>Performance and Reliability for Multiple Application Environments</b><br /><br>&bull;&nbsp;High reliability for Mission Critical applications.<br>

WHERE IT FITS
STORAGE_HDD→ 2.5_SAS_HDD→ 785099-B21
SPECIFICATIONS
Part Number785099-B21
ManufacturerHP
Capacity300GB
Speed15K RPM
COMPONENT DIAGRAM
LABEL 300GB HDD SAS 12Gb/s 69.85 mm (2.75") 100.0 mm 2.5" HDD — MECHANICAL Spinning disk, hot-swap SAS 12Gb/s — Dual-port 300GB | 7200 / 10K / 15K RPM FORM FACTOR — 2.5" Hot-swap, carrier-specific MOUNTING — 4x M3 bottom Standard SFF screw pattern TITLE HDD DRIVE PN 785099-B21 MFR HP HP 300GB 12G SAS 15k 2.5in Ent HDD
KEY FEATURES
•
300GB Capacity
•
15K 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
785407-001Compatible
HP 300GB SAS 12G 15k 512n SFF St HDD
compatible
B9F30ACompatible
HP 300Gb SAS 12G 15K 512n SFF ST HDD for Integrity rx2800
compatible
744995-001Compatible
HP 300Gb SAS 12G 15K 512n SFF HDD - Bare Drive
compatible
748385-001Compatible
HP 300Gb SAS 12G 15K 512n SFF HDD - Bare Drive
compatible
759202-001Compatible
HP 300Gb SAS 12G 15K 512n SFF HDD - Bare Drive
compatible
759221-001Compatible
HP 300Gb SAS 12G 15K 512n SFF HDD - Bare Drive
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 2
B9F30ASUBSTITUTE
HP 300Gb SAS 12G 15K 512n SFF ST HDD
HPE
785407-001SUBSTITUTE
HP 300Gb SAS 12G 15K 512n SFF ST HDD
HPE
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FREQUENTLY ASKED QUESTIONS
What is 785099-B21?
785099-B21 is a HP 300GB 12G SAS 15k 2.5in Ent HDD manufactured by HP. It is classified as a STORAGE_HDD (2.5_SAS_HDD).
What parts can replace 785099-B21?
There are 12 known substitutes for 785099-B21: 785407-001, B9F30A, 744995-001 and 9 more. Substitute compatibility should be verified for your specific system.
Is 785099-B21 still available?
785099-B21 is currently Unknown.
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Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
Last verified: July 2026