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Silver 3.5 inch SAS hard drive with Smart Carrier tray

HP

HP 695510-B21 4TB 7200 RPM SAS 6Gb/s 3.5" internal hard drive

SKU CH-APMV-8E51T MPN 695510-B21

A 4 TB SAS 6Gb/s 3.5" 7200 RPM midline hard drive with Smart Carrier for server storage

  • Total capacity4 TB
  • Interface typeSAS 6Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Mean latency6Gb/s
  • 4 TB capacity stores large data sets
  • 7200 RPM spindle delivers responsive throughput
  • SAS 6Gb/s interface supports fast host transfers
  • 5 inch form factor fits standard drive bays
  • Smart Carrier tray simplifies hot-plug installation

Server storage drive

The HP 695510-B21 is a 4TB 3.5" internal hard drive built for server and storage deployments. It spins at 7200 RPM and connects through a SAS 6Gb/s interface. The bare-drive unit includes a Smart Carrier tray for hot-plug installation in compatible bays.

Suited for capacity-focused arrays

This midline drive targets environments that need large volumes of affordable storage for low-workload tasks such as archiving, backups or secondary data sets. It is not designed for high-transaction databases, latency-sensitive workloads or mission-critical systems that demand enterprise-class endurance.

The SAS 6Gb/s interface decides fit

Your backplane or controller must support SAS 6Gb/s signalling to recognise and run the drive at its rated transfer rate. Without a compatible SAS host the drive cannot be used, so verify the host side before purchase.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $907.99
Pricier than about 90% of the 4,938 comparable items (median $107.99).
Total capacity 4 TB
Higher than about 70% of the 2,372 comparable items (median 2 TB).
Price per TB $227.00 per TB
Pricier than about 81% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameHP
Model name695510-B21
Total capacity4 TB
Recommended useIdeal for Servers
Performance
Rotational speed7,200 RPM
Mean latency6Gb/s
Ports & slots
Interface typeSAS 6Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.45 kg
Package size203 × 127 × 51 mm

Questions about this item

Does the bare drive include the Smart Carrier tray or must I order it separately?

The drive is supplied as a bare drive without a tray; the Smart Carrier tray must be purchased separately if your server bay requires it.

How do I decide between the 4 TB midline model and a higher-capacity SAS drive for my server?

Choose the 4 TB midline drive when you need cost-effective bulk storage for low-workload applications; select a larger-capacity SAS drive only if your storage pool requires more raw space per bay.

What does the 7200 RPM speed mean for actual throughput in a RAID array?

The 7200 RPM spindle delivers sequential read and write performance typical of midline SAS drives; random I/O will be lower, so plan the RAID level and stripe size to match your workload.

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