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Silver 2.5-inch SAS hard drive with tray

HP

HP 431935-B21 72GB 15000 RPM SAS 2.5" laptop hard drive

SKU CH-YDC7-VTHNQ MPN 431935-B21

A 2.5-inch SAS laptop drive delivering 72GB at 15000 RPM for high-throughput workloads

  • Total capacity72 GB
  • Interface typeSAS 3Gb/s
  • Form factor2.5 in (6.35 cm)
  • Rotational speed15,000 RPM
  • Key featuresSerial Attached SCSI is the logical evolution of SCSI, inclu
  • 15000 RPM spindle delivers fast transactional throughput
  • SAS 3Gb/s interface provides reliable enterprise connectivity
  • 72 GB capacity supports mission-critical storage growth
  • 5 inch form factor fits space-constrained server bays
  • Hot-plug tray enables drive replacement without system downtime

Mission-critical storage drive

The HP 431935-B21 is a 72GB 2.5-inch internal hard drive built for servers and workstations that demand consistent uptime. Its 15000 RPM spindle speed targets transactional workloads where low latency matters more than raw capacity. The SAS interface supports hot-plug installation in compatible bays.

SAS 3Gb/s interface ceiling

The 3Gb/s SAS link caps sustained throughput well below modern solid-state alternatives, so sequential transfers will saturate the bus before the platters do. Single-port operation removes multipath redundancy, limiting failover options in high-availability clusters. Cable length and backplane topology impose additional distance constraints.

72GB capacity envelope

Seventy-two gigabytes suits operating-system volumes, database logs or scratch space that benefit from spindle speed rather than bulk capacity. Heavy media libraries, virtualisation images or long-term archives will exhaust the address space quickly, requiring additional drives or a migration to larger-form-factor media.

How it compares

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

Price $138.99
Pricier than about 76% 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 $1,930.42 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 name431935-B21
Total capacity72 GB
Performance
Rotational speed15,000 RPM
Ports & slots
Interface typeSAS 3Gb/s
Size & build
Form factor2.5 in (6.35 cm)
Shipping weight1.81 kg
Package size234 × 180 × 132 mm

Questions about this item

Should I choose the 72GB 15000 RPM SAS drive or a lower-speed alternative for my server?

The 72GB capacity and 15000 RPM spindle suit transactional applications that demand high throughput and low latency.

What does the 15000 RPM figure mean for real-world performance in a laptop?

A 15000 RPM spindle reduces rotational latency, boosting random I/O speed for mission-critical and performance-oriented workloads.

How does the SAS 3Gb/s interface limit transfer rates in practice?

The SAS 3Gb/s link caps the maximum theoretical throughput at 3 gigabits per second, which bounds sustained read and write speeds.

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