Product comparison · 2 internal hard drives

Seagate ST91000640SS-40PK internal hard drive vs Seagate Constellation ST9250610NS-40PK internal hard drive

Key differences

HDD capacity
- ST91000640SS-40PK internal hard drive:1 TB
- Constellation ST9250610NS-40PK internal hard drive:250 GB
Interface
- ST91000640SS-40PK internal hard drive:SAS
- Constellation ST9250610NS-40PK internal hard drive:Serial ATA III
Power consumption (typical)
- ST91000640SS-40PK internal hard drive:6.4 W
- Constellation ST9250610NS-40PK internal hard drive:4.35 W
Power consumption (idle)
- ST91000640SS-40PK internal hard drive:3.85 W
- Constellation ST9250610NS-40PK internal hard drive:2.52 W
Weight
- ST91000640SS-40PK internal hard drive:200 g
- Constellation ST9250610NS-40PK internal hard drive:179 g

Differences highlightedShow differences only

Comparison of ST91000640SS-40PK, ST9250610NS-40PK
27 specifications	A Seagate ST91000640SS-40PK internal hard drive Model ST91000640SS-40PK View product	B Seagate Constellation ST9250610NS-40PK internal hard drive Model ST9250610NS-40PK View product
Features2 differ
HDD capacityDiffers	1 TB	250 GB
HDD speed	7200 RPM	7200 RPM
HDD size	2.5"	2.5"
InterfaceDiffers	SAS	Serial ATA III
Type	HDD	HDD
Component forKnown for one	Server/workstation	Unknown — not stated by the source
Storage drive buffer size	64 MB	64 MB
HDD interface transfer rateKnown for one	6 Gbit/s	Unknown — not stated by the source
Read seek time	8.5 ms	8.5 ms
Write seek time	9.5 ms	9.5 ms
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Mean time between failures (MTBF)	1400000 h	1400000 h
Power2 differ
Power consumption (typical)Differs	6.4 W	4.35 W
Power consumption (idle)Differs	3.85 W	2.52 W
Operating voltage	5 V	5 V
Operational conditionsidentical
Operating temperature (T-T)	5 - 60 °C	5 - 60 °C
Operating vibration	0.5 G	0.5 G
Non-operating vibration	3 G	3 G
Operating shock	70 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	200 g	179 g
Packaging dataidentical
Quantity per pack	40 pc(s)	40 pc(s)
Other featuresidentical
Data transfer rateKnown for one	Unknown — not stated by the source	6 Gbit/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.