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726821-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
HP SMART ARRAY P440/4GB FBWC 12GB 1-PORT INT SAS CONTROLLER

Are you looking to protect your data, expand the storage inside the server or secure the data?<br><br>The HP Smart Array P440 Controller is a low-profile, PCIe3 x8, 12 Gb/s Serial Attached SCSI (SAS) RAID controller that provides enterprise-class storage performance, increased internal scalability with SAS Expander card, and data protection for HP ProLiant Gen9 rack and tower servers. It features eight internal physical links and delivers increased server uptime by providing advanced storage functionality, including online RAID level migration between any RAID levels with flash back write cache (FBWC), global online spare, and pre-failure warning.<br><br>The Gen9 family of controllers supports the HP Smart Storage Battery. With HP Smart Storage Battery, multiple Smart Array controllers are supported without needing additional backup power sources for each controller, resulting in simple upgrade process.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-641-3869, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
CONTROLLER→ RAID_HBA→ 726821-B21
NSN: 5998-01-641-3869
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
Part Number726821-B21
ManufacturerHP
Capacity4GB
NSN5998-01-641-3869
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 726821-B21 MFR HP HP Smart Array P440/4gb FBWC 12GB 1-Port
KEY FEATURES
•
4GB 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
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONTOWER SERVER
PART NAME ASSIGNED BY CONTROLLING AGENCYSMART ARRAY CONTROLLER
END ITEM IDENTIFICATIONTOWER SERVER
PART NAME ASSIGNED BY CONTROLLING AGENCYSMART ARRAY CONTROLLER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
749797-001Compatible
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller
compatible
726823-001Compatible
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller
compatible
761872-B21Compatible
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller - FIO
compatible
784483-001Compatible
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller
compatible
786087-B21Compatible
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller for XL2xx
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 5
726823-001SUBSTITUTE
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller
HPE
749797-001SUBSTITUTE
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller
HPE
761872-B21SUBSTITUTE
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller
HPE
784483-001SUBSTITUTE
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller
HPE
786087-B21SUBSTITUTE
HP Smart Array P440/4Gb FBWC 12G 1-Port Int 1x68-pin SFF-8087 PCI-E 3.0x8 SAS Controller
HPE
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FREQUENTLY ASKED QUESTIONS
What is 726821-B21?
726821-B21 is a HP Smart Array P440/4gb FBWC 12GB 1-Port Int SAS Controller manufactured by HP. It is classified as a CONTROLLER (RAID_HBA).
What parts can replace 726821-B21?
There are 5 known substitutes for 726821-B21: 749797-001, 726823-001, 761872-B21 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 726821-B21?
726821-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-641-3869. 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.
Last verified: July 2026