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Silver 3.5 inch SAS hard drive in hot-swap carrier

HPE

HPE 846996-B21 4TB 7200RPM SAS 12Gb/s 3.5" internal hard drive

SKU CH-XGYE-5HSES

A 4 TB SAS 12 Gb/s enterprise hard drive spinning at 7200 RPM with a 7.4 ms average seek time in a hot-swap 3.5-inch form factor

  • Total capacity4 TB
  • Interface typeSAS 12Gb/s
  • Form factor3.5 in (8.89 cm)
  • Rotational speed7,200 RPM
  • Average seek time7.4 ms
  • 4 TB capacity stores large data sets
  • 12 Gb/s SAS interface moves data quickly
  • 7200 RPM spindle speeds up read access
  • 5 inch form factor fits standard bays
  • 4 ms average seek time reduces latency

Enterprise storage drive

The HPE 846996-B21 is a 4TB 3.5" SAS hard drive built for servers and storage arrays that require consistent throughput. Its 12Gb/s interface suits high-transaction workloads and enterprise applications where data integrity is critical. The 7200 RPM spindle speed balances capacity and access speed for midline deployments.

Thermals and power in normal use

Average seek time is rated at 7.4ms, reflecting typical mechanical latency during mixed read-write operations. The drive is designed for continuous operation in multi-drive chassis where airflow is managed by the enclosure. Power draw scales with workload but remains within standard 3.5" enterprise envelopes.

Build quality and daily implications

Hot-swap carrier support allows removal or insertion without powering down the host system, reducing maintenance windows. The SAS connector provides dual-port redundancy for path failover in supported controllers. Supplied with 0-hour usage, the unit arrives factory-fresh for immediate deployment in compatible bays.

How it compares

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

Price $79.99
Cheaper than about 59% 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 $20.00 per TB
Cheaper than about 92% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameHP
Part number846996-B21
Total capacity4 TB
Performance
Rotational speed7,200 RPM
Average seek time7.4 ms
Ports & slots
Interface typeSAS 12Gb/s
Size & build
Form factor3.5 in (8.89 cm)

Questions about this item

How do I install this 3.5" SAS 12Gb/s drive into a hot-swap carrier?

Slide the 3.5 inch drive into the HP hot-plug carrier until the SAS 12Gb/s connector seats firmly on the backplane. The step most people miss is securing the carrier latch fully — otherwise the drive can disconnect under vibration.

What maintenance will this 4TB 7200 RPM midline drive need over its service life?

No scheduled maintenance is required for the sealed 4TB 7.2K mechanism. Monitor SMART attributes for reallocated sectors and keep the enclosure cooling adequate; replace the unit if seek time degrades past 7.4ms or error counts rise.

What limit appears first when this 7200 RPM SAS drive runs sustained writes?

The 7200 RPM spindle caps sequential throughput, so sustained write speed hits the mechanical ceiling before the SAS 12Gb/s bus saturates. Expect performance to level off at the drive's native media rate during long transfers.

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