726907-B21: HPE Smart Array P440ar/2GB FBWC 12Gb 2-ports Int SAS Controller
Also listed as: 749796-001, 726738-001, 726738-002 · made by Microchip
The HPE Smart Array P440ar/2GB FBWC is an enterprise Flexible Smart Array 12Gb/s SAS controller engineered for HPE ProLiant Gen9 servers. Installing directly into the motherboard's dedicated Flexible Smart Array slot, it preserves PCIe expansion slots while providing 8 internal SAS lanes, 2GB flash-backed write cache, and comprehensive hardware RAID acceleration.
Specifications
| Part number | 726907-B21 |
|---|---|
| Brand | HPE |
| Made by | Microchip |
| Type | RAID controllers |
| Other numbers | 749796-001, 726738-001, 726738-002 |
| Status | end of sale |
| Host interface | PCIe 3.0 x8 (Flexible Smart Array slot) |
| Storage interface | 12Gb/s SAS, 6Gb/s SATA |
| Internal ports | 8 internal SAS/SATA physical links across 2x Mini-SAS HD (SFF-8643) connectors |
| Cache | 2GB Flash Backed Write Cache (FBWC) |
| Raid levels | RAID 0, RAID 1, RAID 1 ADM, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60 |
| Mixed mode | Simultaneous RAID and HBA mode operation supported |
About the 726907-B21
726907-B21 is the HPE Smart Array P440ar/2GB FBWC 12G SAS controller, providing enterprise RAID storage capabilities for HPE ProLiant Gen9 servers. Mounting directly into the motherboard's dedicated Flexible Smart Array mezzanine connector, it frees PCIe riser slots for network or GPU expansion while providing hardware-accelerated RAID and 2GB flash-backed write cache.
Compatibility
Engineered specifically for HPE ProLiant Gen9 servers with a Flexible Smart Array slot, including DL380 Gen9, DL360 Gen9, DL560 Gen9, ML350 Gen9, Apollo 4200 Gen9, and SimpliVity 380 Gen9. Connects to standard internal 8-bay SFF or 4-bay LFF drive backplanes via internal Mini-SAS HD cables.
How to identify a genuine unit
Dedicated Flexible Smart Array mezzanine card with dual internal SFF-8643 mini-SAS HD ports and integrated removable 2GB FBWC daughtercard. Barcode label states option part number 726907-B21, spare part number 749796-001, and assembly part number 726738-001.
Buying used
Inspect the multi-pin mezzanine interface connector and locking thumb-screws for physical damage. Ensure the removable 2GB FBWC daughtercard is securely seated. Verify in HPE Smart Storage Administrator that cache status shows 'OK' when paired with a healthy Smart Storage battery.
Reference prices (last 12 months, updated 2026-10-27)
Used: USD 28 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| ebay.com | used | USD 28 | Tested working HPE P440ar 2GB controller with battery cable | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Fits these models
- HPE ProLiant DL380 Gen9
- HPE ProLiant DL360 Gen9
- HPE ProLiant DL560 Gen9
- HPE ProLiant ML350 Gen9
- HPE Apollo 4200 Gen9
- HPE SimpliVity 380 Gen9
Check compatibility with HPE
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that HPE has tested with the HPE 726907-B21.
- Compatibility HPE SPOCK (storage, SAN and host compatibility)
- Part lookup HPE PartSurfer (spare and option part numbers)
- Support HPE Support Center
Equivalent part numbers
- Dell H730P-MINI Dell PERC H730P Mini 12Gb/s SAS Controller with 2GB NV Cache
FAQ
Does the P440ar controller require an external battery?
Yes, to enable write caching on the 2GB FBWC module, an HPE 96W Smart Storage Battery (727258-B21) must be connected to the server motherboard.
Can the P440ar operate in HBA mode for software-defined storage?
Yes, HPE Smart Storage Administrator allows individual drives or the entire controller to be configured in HBA mode for VMware vSAN or ZFS deployments.
Buying or selling 726907-B21?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- HPE Smart Array P440ar Controller QuickSpecs, checked 2026-10-27