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PartsTable / CONTROLLER / 631670-B21
631670-B21 ✓ Verified by PartsTable
HP · CONTROLLER · RAID_HBA
WHAT YOU NEED TO KNOW
RAID HBAs — always confirm bracket height (full or half). Ship unlocked with test reports. Our edge: we can verify specific firmware versions. Key checks: Ship with test reports. Ship UNLOCKED.
Firmware must match server
PRODUCT OVERVIEW

The HP Smart Array P420 Controller is a low profile, 6 Gb/s, PCIe 3.0, Serial Attached SCSI (SAS) RAID controller that provides enterprise class, storage performance and data protection for select HP ProLiant Gen8 rack and tower servers. <br><br>It features eight internal SAS ports and delivers increased server uptime by providing advanced storage functionality, including online RAID level migration (between any RAID levels) with flash back write cache, global online spare, and pre-failure warning. Data Compatibility among all models of Smart Array controllers allows simple and easy migration at any time when needs for higher performance, capacity, and availability increase.

Even new generations of Smart Array controllers can understand the data format of previous generations of Smart Array controllers. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-613-1411, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
CONTROLLER→ RAID_HBA→ 631670-B21
NSN: 5998-01-613-1411
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
Part Number631670-B21
ManufacturerHP
Capacity1GB
NSN5998-01-613-1411
COMPONENT DIAGRAM
RAID ASIC CACHE FBWC SAS 0 SAS 1 SAS 2 SAS 3 BATT EXT 0 EXT 1 PCIe x8 ~187 mm STORAGE CONTROLLER | RAID 0,1,5,6,10 | PCIe SAS/SATA | FBWC cache | Battery backup connector | TITLE RAID CTRL PN 631670-B21 MFR HP HP Smart Array P420/1GB FBWC 6Gb 2-ports
KEY FEATURES
•
1GB Capacity
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
633538-001Compatible
HP Smart Array P420/ZM 6G 2-Port Int PCI-E 3.0x8 SAS Controller
compatible
610670-001Compatible
HP Smart Array P420/ZM 6G 2-Port Int PCI-E 3.0x8 SAS Controller
compatible
631671-B21Compatible
HP Smart Array P420 2Gb FBWC 6G 2-Port Int PCI-E 3.0x8 SAS Controller
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
610670-001SUBSTITUTE
HP Smart Array P420 1Gb FBWC 6G 2-Port Int PCI-E 3.0x8 SAS Controller
HPE
631671-B21SUBSTITUTE
HP Smart Array P420 1Gb FBWC 6G 2-Port Int PCI-E 3.0x8 SAS Controller
HPE
633538-001SUBSTITUTE
HP Smart Array P420 1Gb FBWC 6G 2-Port Int PCI-E 3.0x8 SAS Controller
HPE
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FREQUENTLY ASKED QUESTIONS
What is 631670-B21?
631670-B21 is a HP Smart Array P420/1GB FBWC 6Gb 2-ports Int SAS Controller manufactured by HP. It is classified as a CONTROLLER (RAID_HBA).
What parts can replace 631670-B21?
There are 3 known substitutes for 631670-B21: 633538-001, 610670-001, 631671-B21. Substitute compatibility should be verified for your specific system.
What is the NSN for 631670-B21?
631670-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-613-1411. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026