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Small silver 2.5 inch enterprise SAS hard drive with hot-plug carrier

HP

HP 512547-B21 146GB 15000 RPM SAS 6Gb/s 2.5" SFF laptop hard drive

SKU CH-6KV2-W7F9B MPN 512547-B21

146 GB 15,000 RPM SAS 6 Gb/s 2.5" SFF drive with 2.58 ms seek time for high-transaction server workloads

  • Total capacity146 GB
  • Interface typeSAS 6Gb/s
  • Form factor2.5 in SFF
  • Average seek time2.58 ms
  • Rotational speed15,000 RPM
  • Key featuresHP SAS Enterprise and Midline hard drives deliver high perfo
  • 15,000 RPM spindle speed accelerates server transaction processing
  • SAS 6Gb/s interface delivers 600 MB/s peak throughput
  • 58 ms average seek time reduces latency for high-I/O workloads
  • Hot-pluggable 2.5" SFF form factor enables drive swaps without downtime
  • REACH certified and 15.87 oz lightweight design supports dense server deployments

146 GB 15 000 RPM SAS drive

This HP Enterprise 2.5-inch SFF drive delivers 146 GB of storage on a SAS 6 Gb/s interface. Its 15 000 RPM spindle speed and 2.58 ms average seek time target high-transaction server workloads. The drive is sold new and supports hot-plug installation in compatible bays. It is built for environments that demand consistent I/O throughput around the clock.

Hot-plug 2.5″ SFF form factor

The 2.5-inch SFF form factor fits standard hot-plug drive carriers, allowing replacement without powering down the chassis. A SAS backplane or controller providing a 6 Gb/s link is required. The compact 0.6-inch height leaves vertical space for additional drives in dense server enclosures. No separate power adapter is needed beyond the backplane connection.

Sustained 600 MB/s transfer rate

Under continuous load the drive maintains a maximum external transfer rate of 600 MB/s (4.7 Gbit/s). The 15 000 RPM spindle keeps latency low during extended random-access patterns typical of database and virtualization workloads. Enterprise-grade firmware and REACH-compliant materials support 24×7 operation without thermal throttling. The 15.87 oz weight reflects a robust mechanical assembly designed for constant vibration.

How it compares

Measured against everything we stock in 2.5-Inch Internal Laptop HDDs, at today’s prices. Recalculated every night.

Price $74.99
Pricier than about 54% of the 645 comparable items (median $66.99).
Total capacity 146 GB
Lower than about 80% of the 419 comparable items (median 320 GB).
Price per TB $513.63 per TB
Pricier than about 77% of the 416 comparable items (median $233.48 per TB).

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Specifications

Product
Brand nameHP
Product lineEnterprise
Model name512547-B21
Total capacity146 GB
Recommended useIdeal for Servers
Performance
Average seek time2.58 ms
Rotational speed15,000 RPM
Ports & slots
Interface typeSAS 6Gb/s
Size & build
Form factor2.5 in SFF
Shipping weight0.91 kg
Package size311 × 259 × 198 mm

Questions about this item

At what spindle speed does this 15000 RPM drive hit its sustained throughput ceiling?

The 15000 RPM spindle and 600 MB/s external transfer rate define the sustained ceiling; the 2.58 ms average seek time shows the latency floor under continuous load.

How much heat and noise does the 15.87 oz SAS 6Gb/s unit add when running 24/7 in a server bay?

At 15.87 oz in a 0.6" x 3.1" x 5.4" hot-pluggable SFF form factor the drive fits dense server bays; enterprise SAS mechanics are built for 24x7 operation.

Which server backplane and controller do I already need for this 2.5" SAS 6Gb/s drive to work?

A 2.5" SFF SAS backplane with a 6Gb/s SAS controller or RAID card is required; the drive is hot-pluggable and designed for HP server carriers.

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