Product comparison · 2 internal hard drives

Seagate 2 TB, SAS, 7200 RPM vs Seagate ST91000640SS-40PK internal hard drive

Key differences

HDD capacity
- 2 TB, SAS, 7200 RPM:2 TB
- ST91000640SS-40PK internal hard drive:1 TB
Storage drive buffer size
- 2 TB, SAS, 7200 RPM:128 MB
- ST91000640SS-40PK internal hard drive:64 MB
HDD interface transfer rate
- 2 TB, SAS, 7200 RPM:12 Gbit/s
- ST91000640SS-40PK internal hard drive:6 Gbit/s
Bytes per sector
- 2 TB, SAS, 7200 RPM:4096
- ST91000640SS-40PK internal hard drive:512
Mean time between failures (MTBF)
- 2 TB, SAS, 7200 RPM:2000000 h
- ST91000640SS-40PK internal hard drive:1400000 h
Power consumption (typical)
- 2 TB, SAS, 7200 RPM:6.02 W
- ST91000640SS-40PK internal hard drive:6.4 W
Power consumption (idle)
- 2 TB, SAS, 7200 RPM:3.53 W
- ST91000640SS-40PK internal hard drive:3.85 W
Operating temperature (T-T)
- 2 TB, SAS, 7200 RPM:5 - 55 °C
- ST91000640SS-40PK internal hard drive:5 - 60 °C

Differences highlightedShow differences only

Comparison of 2 TB, SAS, 7200 RPM, ST91000640SS-40PK
27 specifications	A Seagate 2 TB, SAS, 7200 RPM View product	B Seagate ST91000640SS-40PK internal hard drive Model ST91000640SS-40PK View product
Features5 differ
HDD capacityDiffers	2 TB	1 TB
HDD speed	7200 RPM	7200 RPM
HDD size	2.5"	2.5"
Interface	SAS	SAS
Type	HDD	HDD
Component for	Server/workstation	Server/workstation
Storage drive buffer sizeDiffers	128 MB	64 MB
HDD interface transfer rateDiffers	12 Gbit/s	6 Gbit/s
Read seek timeKnown for one	Unknown — not stated by the source	8.5 ms
Write seek timeKnown for one	Unknown — not stated by the source	9.5 ms
Average latency	4.16 ms	4.16 ms
Bytes per sectorDiffers	4096	512
Mean time between failures (MTBF)Differs	2000000 h	1400000 h
Power2 differ
Power consumption (typical)Differs	6.02 W	6.4 W
Power consumption (idle)Differs	3.53 W	3.85 W
Operating voltage	5 V	5 V
Power consumption (standby)Known for one	1.52 W	Unknown — not stated by the source
Operational conditions2 differ
Operating temperature (T-T)Differs	5 - 55 °C	5 - 60 °C
Operating vibration	0.5 G	0.5 G
Non-operating vibration	3 G	3 G
Operating shockDiffers	25 G	70 G
Non-operating shock	400 G	400 G
Weight & dimensions1 differ
Width	70.1 mm	70.1 mm
Depth	100.5 mm	100.5 mm
Height	15 mm	15 mm
WeightDiffers	198 g	200 g
Packaging dataidentical
Quantity per pack	40 pc(s)	40 pc(s)

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.