Product comparison · 2 internal hard drives

Seagate Constellation ST91000642SS internal hard drive vs Seagate Constellation ST9500622NS internal hard drive

Key differences

HDD capacity
- Constellation ST91000642SS internal hard drive:1 TB
- Constellation ST9500622NS internal hard drive:500 GB
Interface
- Constellation ST91000642SS internal hard drive:SAS
- Constellation ST9500622NS internal hard drive:Serial ATA
HDD number of heads
- Constellation ST91000642SS internal hard drive:8
- Constellation ST9500622NS internal hard drive:4
Read seek time
- Constellation ST91000642SS internal hard drive:7.5 ms
- Constellation ST9500622NS internal hard drive:8.5 ms
Write seek time
- Constellation ST91000642SS internal hard drive:8.5 ms
- Constellation ST9500622NS internal hard drive:9.5 ms
Width
- Constellation ST91000642SS internal hard drive:69.8 mm
- Constellation ST9500622NS internal hard drive:70 mm
Depth
- Constellation ST91000642SS internal hard drive:100 mm
- Constellation ST9500622NS internal hard drive:14.8 mm
Height
- Constellation ST91000642SS internal hard drive:15 mm
- Constellation ST9500622NS internal hard drive:100.5 mm

Differences highlightedShow differences only

Comparison of ST91000642SS, ST9500622NS
34 specifications	A Seagate Constellation ST91000642SS internal hard drive Model ST91000642SS View product	B Seagate Constellation ST9500622NS internal hard drive Model ST9500622NS View product
Features5 differ
HDD capacityDiffers	1 TB	500 GB
InterfaceDiffers	SAS	Serial ATA
Component forKnown for one	Server/workstation	Unknown — not stated by the source
HDD number of headsDiffers	8	4
Read seek timeDiffers	7.5 ms	8.5 ms
Write seek timeDiffers	8.5 ms	9.5 ms
Mean time between failures (MTBF)Known for one	1400000 h	Unknown — not stated by the source
Start/stop cyclesKnown for one	Unknown — not stated by the source	300000
Poweridentical
Power consumption (typical)Known for one	6.35 W	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	69.8 mm	70 mm
DepthDiffers	100 mm	14.8 mm
HeightDiffers	15 mm	100.5 mm
WeightDiffers	200 g	183 g
Other featuresidentical
Plug and PlayKnown for one	Yes	Unknown — not stated by the source
Disks included quantityKnown for one	Unknown — not stated by the source	2 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.