Product comparison · 2 internal hard drives

Seagate 2 TB, SATA3, 7200 RPM vs Seagate Constellation ST91000642SS-40PK internal hard drive

21specifications compared
9differ
12identical
8known for one product only

Key differences

The Seagate 2 TB, SATA3, 7200 RPM has 1 TB more HDD capacity than the Seagate Constellation ST91000642SS-40PK internal hard drive (2 TB vs 1 TB). The Seagate 2 TB, SATA3, 7200 RPM has 64 MB more storage drive buffer size than the Seagate Constellation ST91000642SS-40PK internal hard drive (128 MB vs 64 MB). The Seagate 2 TB, SATA3, 7200 RPM has 600,000 h more mean time between failures (MTBF) than the Seagate Constellation ST91000642SS-40PK internal hard drive (2000000 h vs 1400000 h). Interface: Serial ATA III on the Seagate 2 TB, SATA3, 7200 RPM, SAS on the Seagate Constellation ST91000642SS-40PK internal hard drive. Component for: NAS on the Seagate 2 TB, SATA3, 7200 RPM, Server/workstation on the Seagate Constellation ST91000642SS-40PK internal hard drive.

HDD capacity
- 2 TB, SATA3, 7200 RPM:2 TB
- Constellation ST91000642SS-40PK internal hard drive:1 TB
Interface
- 2 TB, SATA3, 7200 RPM:Serial ATA III
- Constellation ST91000642SS-40PK internal hard drive:SAS
Component for
- 2 TB, SATA3, 7200 RPM:NAS
- Constellation ST91000642SS-40PK internal hard drive:Server/workstation
Storage drive buffer size
- 2 TB, SATA3, 7200 RPM:128 MB
- Constellation ST91000642SS-40PK internal hard drive:64 MB
Mean time between failures (MTBF)
- 2 TB, SATA3, 7200 RPM:2000000 h
- Constellation ST91000642SS-40PK internal hard drive:1400000 h
Power consumption (idle)
- 2 TB, SATA3, 7200 RPM:3.87 W
- Constellation ST91000642SS-40PK internal hard drive:3.85 W
Operating temperature (T-T)
- 2 TB, SATA3, 7200 RPM:5 - 55 °C
- Constellation ST91000642SS-40PK internal hard drive:5 - 60 °C
Operating shock
- 2 TB, SATA3, 7200 RPM:25 G
- Constellation ST91000642SS-40PK internal hard drive:70 G

Side by side

Differences highlightedShow differences only

Comparison of 2 TB, SATA3, 7200 RPM, ST91000642SS-40PK
29 specifications	A Seagate 2 TB, SATA3, 7200 RPM View product	B Seagate Constellation ST91000642SS-40PK internal hard drive Model ST91000642SS-40PK View product
Features5 differ
HDD capacityDiffers	2 TB	1 TB
HDD speed	7200 RPM	7200 RPM
HDD size	2.5"	2.5"
InterfaceDiffers	Serial ATA III	SAS
Type	HDD	HDD
Component forDiffers	NAS	Server/workstation
Storage drive buffer sizeDiffers	128 MB	64 MB
HDD interface transfer rateKnown for one	6 Gbit/s	Unknown — not stated by the source
Average latency	4.16 ms	4.16 ms
Bytes per sectorKnown for one	4096	Unknown — not stated by the source
Mean time between failures (MTBF)Differs	2000000 h	1400000 h
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
Power1 differ
Power consumption (typical)Known for one	5.22 W	Unknown — not stated by the source
Power consumption (standby)Known for one	1.14 W	Unknown — not stated by the source
Power consumption (idle)Differs	3.87 W	3.85 W
Operating voltage	5 V	5 V
Power consumption (read)Known for one	Unknown — not stated by the source	6.4 W
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)
Other featuresidentical
Security algorithmsKnown for one	Unknown — not stated by the source	256-bit AES, FIPS 140-2

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.

More internal hard drive comparisons

All internal hard drive comparisons