The HPE P91231-B21 is a 7.68TB enterprise NVMe solid state drive designed for read-intensive workloads. It uses a PCIe Gen5 NVMe interface and an E3.S EC1 E3 Thin form factor for supported HPE server platforms. The drive is intended for applications requiring high-capacity flash storage and low-latency PCIe connectivity, including virtualization, analytics, databases, content repositories, and general enterprise data access.
This is a multi-vendor HPE option, so the underlying SSD manufacturer may vary by shipment. HPE qualification, firmware, carrier, and platform compatibility should be verified before deployment. The drive is supplied as an HPE option part rather than a generic retail NVMe device.
Technical Specifications
| Part Number | P91231-B21 |
| OEM/Manufacturer Part | HPE |
| Drive Type | Enterprise NVMe solid state drive |
| Workload Class | Read intensive |
| Capacity | 7.68TB |
| Interface | PCIe Gen5 NVMe |
| Protocol | NVMe |
| Form Factor | E3.S EC1 E3 Thin |
| Drive Size | E3.S thin enterprise form factor |
| Use Case | Enterprise server storage |
| Vendor Type | Multi vendor |
| Power | Platform-dependent; confirm server and backplane requirements |
| Compatibility | HPE systems with supported E3.S PCIe Gen5 NVMe bays and firmware |
| Warranty | HPE warranty and support terms apply; verify by sales configuration |
Install the P91231-B21 only in an HPE server, storage platform, or drive enclosure that explicitly supports E3.S EC1 E3 Thin NVMe drives. The host must provide a compatible E3.S backplane, PCIe Gen5 connectivity, adequate power, and current system, backplane, and drive firmware. A standard 2.5-inch U.3 carrier or an M.2 slot is not a substitute for the required E3.S bay.
Before ordering, check the target platform QuickSpecs, HPE option matrix, and current firmware compatibility list. Confirm the supported drive capacity, hot-plug capability, RAID or HBA support, and operating-system NVMe support. Because this is a multi-vendor HPE SSD, use HPE-qualified firmware and management tools rather than assuming firmware from an equivalent third-party drive will be compatible.
Prices
| Merchant | Shiping | Availablity | Price | |
|---|---|---|---|---|
| Amazon.com | -- | -- | See Site | Visit Site |
| BoostHardware.com | -- | In Stock | See Site | Visit Site |
Compatible Substitutes
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HPE P91231-B21
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HPE P40505-B21
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Representative 7.68TB E3.S Gen5 RI SSD
|
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|---|---|---|---|
| Part Number | P91231-B21 | P40505-B21 | Platform-qualified equivalent required |
| Capacity | 7.68TB | 7.68TB | 7.68TB |
| Interface | PCIe Gen5 NVMe | PCIe Gen4 NVMe | PCIe Gen5 NVMe |
| Form Factor | E3.S EC1 E3 Thin | 2.5-inch U.3 | E3.S thin |
| Workload | Read intensive | Read intensive | Read intensive |
| Compatibility | HPE platforms with supported E3.S Gen5 bays | HPE platforms with supported U.3 NVMe bays | Only where the HPE platform and firmware list it as supported |
| Boost Hardware |
Which systems support the P91231-B21?
It is intended for HPE platforms with an E3.S EC1 E3 Thin bay, PCIe Gen5 NVMe support, and applicable HPE firmware qualification. Confirm the exact server or enclosure in the current HPE QuickSpecs before purchase.
Can this SSD be installed in a standard 2.5-inch NVMe bay?
No. The E3.S thin form factor is physically and electrically different from a standard 2.5-inch U.3 drive. The host requires the correct E3.S carrier, backplane, cabling, and power support.
Is the P91231-B21 suitable for write-intensive workloads?
This is a read-intensive SSD. Use an HPE mixed-use or write-intensive model when the workload has sustained high write volume or strict write-endurance requirements.
Does PCIe Gen5 require a Gen5 server?
The host must support the E3.S drive and its PCIe connection. Operation at a lower negotiated PCIe generation may be possible on some platforms, but platform qualification and performance should be verified.
Does multi vendor mean the drive specifications can vary?
The underlying SSD manufacturer may vary under the same HPE option part number. HPE qualification and firmware control the supported configuration, but detailed performance and endurance values should be confirmed from the supplied drive documentation.
What should be checked before replacing an existing drive?
Verify the HPE option matrix, E3.S form factor, capacity support, backplane generation, RAID or HBA compatibility, firmware level, operating-system NVMe support, and available power and cooling.