HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD
Brand: HPE | Category: Enterprise SSDs
SKU: HPE-P21125-B21 | Part #: P21125-B21 | MPN: P21125-B21
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About the HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD
Power efficiency in dense all-flash arrays begins with endurance design: the HPE P21125-B21 is a 400GB SAS 12G Write Intensive SSD built for sustained workloads where capacity density and reliability matter equally. This Small Form Factor 2.5-inch drive operates over SAS 12Gb/s and SAS 24G interfaces, making it a drop-in upgrade path for HPE ProLiant Gen9, Gen10, and Gen10 Plus servers, as well as HPE Synergy and HPE Apollo platforms. The SS540 series pairs the Write Intensive endurance profile with Smart Carrier hot-plug technology, enabling non-disruptive drive replacement and seamless integration into existing infrastructure without downtime.
Storage architects and IT procurement teams standardizing on HPE platforms choose the P21125-B21 when write-heavy database operations, transactional workloads, and high-frequency OLTP environments demand predictable performance and extended drive lifespan. The Write Intensive designation ensures this 400GB drive sustains demanding I/O patterns across virtualized datacenters, backup appliances, and mission-critical arrays. HPE iLO, HPE Smart Storage Administrator, and HPE OneView provide unified visibility and lifecycle management, reducing operational overhead while QuickSpecs validation guarantees compatibility and performance benchmarking across certified HPE environments.
The P21125-B21 ships with HPE manufacturer support and carries the trusted reliability of the HPE brand across thousands of deployments in EMEA and APAC regions. Whether you are refreshing storage tier capacity, building out all-flash arrays, or maintaining spares inventory, Omnixon Global supplies genuine HPE enterprise SSDs with full technical documentation and regional support. Contact our team today with your configuration requirements and volume needs to request a formal quotation.
Technical Specifications
| Brand | HPE |
| Category | Enterprise SSDs |
| SKU | HPE-P21125-B21 |
| Part Number | P21125-B21 |
| Condition | New |
| Capacity | 400GB |
| Form Factor | 2.5" |
| Interface | SAS 24Gb/s |
| Manufacturer Part Number | P21125-B21 |
| Product Name | HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD |
| Series | SS540 |
| Raw Capacity | 400 GB |
| Form Factor | SFF (Small Form Factor) 2.5-inch |
| Host Interface | SAS 12Gb/s |
| Interface Compatibility | SAS 12G / SAS 24G |
| Drive Type | Solid State Drive (SSD) |
| Endurance Profile | Write Intensive (WI) |
| Carrier Type | Smart Carrier (SC) — Hot-Plug |
| Hot-Plug Support | Yes |
| HPE Platform Compatibility | HPE ProLiant Gen9, Gen10, Gen10 Plus; HPE Synergy; HPE Apollo |
| Management Integration | HPE iLO, HPE Smart Storage Administrator (SSA), HPE OneView |
| QuickSpecs Validated | Yes |
| Manufacturer Support | HPE Manufacturer Support included |
Frequently Asked Questions about HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD
What does the HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD do?
At 400GB, the HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD suits enterprise data-center storage tiers — all-flash arrays, hyperconverged storage pools (vSAN, Ceph), database backends, and high-throughput backup repositories. The SAS 12G/24G interface is supported by major server platforms.
What are the headline specs of the HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD?
Key specifications for the HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD: capacity 400GB; form factor SFF (2.5in); interface SAS 12G/24G; 3 to 5 years (HPE manufacturer) support; new condition. Manufacturer part number P21125-B21. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.
Is the HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD compatible with my infrastructure?
The HPE P21125-B21 - HPE 400GB SAS 12G Write Intensive SFF SC SS540 SSD uses a SAS 12G/24G interface in a SFF (2.5in) form factor. It's compatible with server platforms that expose this interface — typical deployments include Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, and Supermicro SuperServer chassis. For specific vendor part-number compatibility, our team validates against the manufacturer support matrix.