The HP 781518‑B21 is a 1.2 TB 10,000 RPM SAS (Serial Attached SCSI) hard drive in a 2.5″ Small Form Factor (SFF) designed for enterprise and data center use. It connects over a 12 Gb/s SAS interface, delivering high throughput, low latency, and sustained performance for demanding workloads. This drive is ideal for transaction processing, databases, virtualization, and business‑critical applications in HP ProLiant and compatible server platforms. It often includes an HP Smart Carrier with intuitive status indicators to simplify serviceability and reduce human error.
High Speed: 10,000 RPM rotational speed for fast access and quick response times.
12 Gb/s SAS Interface: Provides robust data transfer performance and scalability for modern servers.
Enterprise‑Class Drive: Optimized for heavy server workloads and 24×7 operation.
Hot‑Swappable: Supports hot‑plug installation and replacement in compatible server drive bays, minimizing downtime.
Smart Carrier: Includes HP Smart Carrier with LED icons for drive status and service indication.
Tested & Qualified: Designed under rigorous enterprise testing programs to ensure durability and reliability.
Server Use: Built for HP ProLiant servers and compatible enterprise storage systems (Gen8 / Gen9 / Gen10 and others).
Workloads: Great for virtualization, databases, high‑transaction environments, analytics, and other demanding applications.
| Specification | Details |
|---|---|
| Model / Part Number | 781518‑B21 |
| Capacity | 1.2 TB (≈1,200,243 MB) |
| Form Factor | 2.5″ SFF (Small Form Factor) |
| Interface | SAS (Serial Attached SCSI) – 12 Gb/s |
| Rotational Speed | 10,000 RPM |
| Average Seek Time | ~3.7 ms |
| Transfer Rate (Max) | Up to 12 Gb/s theoretical |
| Physical Dimensions | ~75.7 mm × 118.7 mm × 15.6 mm |
| Sector Size / Blocks | 512 B per sector; ~2,344,225,968 logical blocks |
| Operating Temp. | ~10° to 35 °C (50° to 95° F) |
| Hot‑Plug / Hot‑Swap | Supported (with compatible backplane) |
| Smart Carrier | Yes – with status indicators |
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