Product comparison · 2 internal hard drives

Seagate 2TB SATAIII vs Seagate Constellation ST91000641SS-30PK internal hard drive

16specifications compared
14differ
2identical
16known for one product only

Key differences

HDD capacity
- 2TB SATAIII:2 TB
- Constellation ST91000641SS-30PK internal hard drive:1 TB
HDD speed
- 2TB SATAIII:5900 RPM
- Constellation ST91000641SS-30PK internal hard drive:7200 RPM
HDD size
- 2TB SATAIII:3.5"
- Constellation ST91000641SS-30PK internal hard drive:2.5"
Interface
- 2TB SATAIII:Serial ATA III
- Constellation ST91000641SS-30PK internal hard drive:SAS
Mean time between failures (MTBF)
- 2TB SATAIII:1000000 h
- Constellation ST91000641SS-30PK internal hard drive:1400000 h
Power consumption (typical)
- 2TB SATAIII:4.3 W
- Constellation ST91000641SS-30PK internal hard drive:6.4 W
Power consumption (idle)
- 2TB SATAIII:3 W
- Constellation ST91000641SS-30PK internal hard drive:3.85 W
Operating voltage
- 2TB SATAIII:5 / 12 V
- Constellation ST91000641SS-30PK internal hard drive:5 V

Side by side

Differences highlightedShow differences only

Comparison of 2TB SATAIII, ST91000641SS-30PK
32 specifications	A Seagate 2TB SATAIII View product	B Seagate Constellation ST91000641SS-30PK internal hard drive Model ST91000641SS-30PK View product
Features5 differ
HDD capacityDiffers	2 TB	1 TB
HDD speedDiffers	5900 RPM	7200 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	Serial ATA III	SAS
Type	HDD	HDD
Storage drive buffer size	64 MB	64 MB
HDD interface transfer rateKnown for one	Unknown — not stated by the source	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 latencyKnown for one	Unknown — not stated by the source	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Mean time between failures (MTBF)Differs	1000000 h	1400000 h
Component forKnown for one	NAS	Unknown — not stated by the source
HDD sustained transfer rateKnown for one	159 MiB/s	Unknown — not stated by the source
Start/stop cyclesKnown for one	600000	Unknown — not stated by the source
Power3 differ
Power consumption (typical)Differs	4.3 W	6.4 W
Power consumption (idle)Differs	3 W	3.85 W
Operating voltageDiffers	5 / 12 V	5 V
Power consumption (standby)Known for one	0.3 W	Unknown — not stated by the source
Start-up currentKnown for one	2 A	Unknown — not stated by the source
Operational conditions1 differ
Operating temperature (T-T)Differs	0 - 70 °C	5 - 60 °C
Operating vibrationKnown for one	Unknown — not stated by the source	0.5 G
Non-operating vibrationKnown for one	Unknown — not stated by the source	3 G
Operating shockKnown for one	Unknown — not stated by the source	70 G
Non-operating shockKnown for one	Unknown — not stated by the source	400 G
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	101.6 mm	70.1 mm
DepthDiffers	147 mm	100.5 mm
HeightDiffers	26.1 mm	15 mm
WeightDiffers	535 g	200 g
Packaging data1 differ
Quantity per packDiffers	20 pc(s)	30 pc(s)
Packaging contentidentical
Storage drive adapter includedKnown for one	No	Unknown — not stated by the source

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.

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