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A 2.5 inch internal hard drive with a silver metal casing and SAS connector

DELL

DELL ST91000640SSProduct 1TB SAS 7200RPM 2.5" 64MB cache internal hard drive

SKU CH-T8RQ-HH1HY MPN ST91000640SSProduct

A 1 TB internal hard drive with a SAS 6Gb/s interface, 7200 RPM spindle speed and 64 MB cache in a 2.5 inch form factor

  • Total capacity1 TB
  • Interface typeSAS 6Gb/s
  • Form factor2.5 in (6.35 cm)
  • Rotational speed7,200 RPM
  • Cache memory64 MB
  • Average seek time8 ms
  • 1TB capacity for large data sets
  • 7200 RPM spindle speed for responsive access
  • SAS 6Gb/s interface for reliable throughput
  • 64MB cache to smooth burst workloads
  • 5" form factor fits dense storage arrays

1 TB NL-SAS drive for Dell storage arrays

This 2.5" hard drive provides 1 TB of capacity at 7200 RPM with a 64 MB cache and a 6 Gb/s SAS interface. It is built for internal use in compatible Dell systems. The part number is ST91000640SSProduct and the Dell part number is VXTPX.

Suits admins expanding SC-series arrays.

The drive is validated for Dell Storage SCv2000, SCv3000 and SC4000 systems. Buyers whose servers or workstations lack a 6 Gb/s SAS backplane or controller cannot install this drive. It is also unsuitable for anyone needing a larger capacity than 1 TB.

Deciding spec: 6 Gb/s SAS interface

The drive communicates over a Near Line SAS link at 6 Gb/s. If the target chassis or controller does not support this exact interface, the drive will not function. Confirm SAS compatibility 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 $24.99
Cheaper than about 93% of the 4,938 comparable items (median $107.99).
Total capacity 1 TB
Lower than about 60% of the 2,372 comparable items (median 2 TB).
Price per TB $24.99 per TB
Cheaper than about 89% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameDell
Part numberVXTPX
Total capacity1 TB
Performance
Rotational speed7,200 RPM
Average seek time8 ms
Storage
Cache memory64 MB
Ports & slots
Interface typeSAS 6Gb/s
Size & build
Form factor2.5 in (6.35 cm)

Questions about this item

Is the 1TB capacity the only option for this NL-SAS drive?

This drive is offered in a single 1TB capacity with a 64MB cache and 7200 RPM spindle speed.

How does the 7200 RPM spindle speed affect performance in a Dell storage array?

The 7200 RPM rotation provides near-line performance with an 8ms average seek time, suited for capacity-oriented workloads on compatible Dell SC series arrays.

What does the 6Gb/s SAS interface limit in a real deployment?

The SAS 6Gb/s interface caps the maximum host transfer rate at 6Gb/s and requires a compatible SAS backplane or controller to operate.

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