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Small silver 2.5 inch SAS hard drive with tray

HP

HP 375861-B21 72GB 10000 RPM SAS 3Gb/s 2.5" laptop hard drive

SKU CH-0CWW-AZVBG MPN 375861-B21

72 GB 10000 RPM SAS 3Gb/s 2.5" hot-plug laptop drive for enterprise 24/7 operation

  • Total capacity72 GB
  • Interface typeSAS 3Gb/s
  • Form factor2.5 in (6.35 cm)
  • Rotational speed10,000 RPM
  • Key featuresSerial Attached SCSI is the logical evolution of SCSI, inclu
  • 72 GB capacity stores enterprise datasets
  • 10000 RPM spindle reduces access latency
  • SAS 3Gb/s interface enables 24/7 operation
  • 5 inch hot-plug form factor fits dense bays
  • Enterprise-class design rated for 365 day duty cycle

Enterprise laptop drive

The HP 375861-B21 is a 72GB 2.5 inch internal hard drive built for enterprise laptops and hot-plug bays. It uses a SAS 3Gb/s interface and spins at 10000 RPM to serve workloads that demand consistent throughput in a compact form factor.

Thermals and power

Designed for 24/7 operation across 365 days, the drive meets enterprise-class thermal and power expectations without additional cooling mandates. The SAS interface and 10000 RPM spindle balance performance with the power envelope typical of laptop drive bays.

Build and connectors

A hot-pluggable tray is included so the drive can be inserted or removed without shutting down the host system. The 2.5 inch SAS connector layout fits standard enterprise laptop caddies and backplanes, simplifying maintenance and array rebuilds.

How it compares

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

Price $197.99
Pricier than about 84% of the 645 comparable items (median $66.99).
Total capacity 72 GB
Lower than about 91% of the 419 comparable items (median 320 GB).
Price per TB $2,749.86 per TB
Pricier than about 91% of the 416 comparable items (median $233.48 per TB).

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Specifications

Product
Brand nameHP
Model name375861-B21
Total capacity72 GB
Performance
Rotational speed10,000 RPM
Ports & slots
Interface typeSAS 3Gb/s
Size & build
Form factor2.5 in (6.35 cm)
Shipping weight0.91 kg
Package size241 × 191 × 137 mm

Questions about this item

How do I install the HP 375861-B21 2.5" SAS drive in a hot-plug bay, and what step is often missed?

Slide the drive into the bay until the SAS connector seats firmly; the step many miss is pressing the release latch fully home so the drive locks and the controller recognises the 3Gb/s link.

What maintenance or replacement will the 10000 RPM SAS drive need after continuous 24/7 365 operation?

Enterprise SAS drives are rated for constant use; plan replacement when SMART attributes show reallocated sectors or when the 72GB capacity no longer meets workload demands.

What limit appears first on the 72GB 10000 RPM SAS 3Gb/s drive under sustained heavy I/O?

The 3Gb/s SAS interface bandwidth saturates before the mechanical 10000 RPM platters, capping sustained throughput at the link speed.

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