Product comparison · 2 internal hard drives

Seagate 146.3GB 3.5 vs Seagate Constellation ST91000640NS-40PK internal hard drive

21specifications compared
20differ
1identical
9known for one product only

Key differences

HDD capacity
- 146.3GB 3.5:146.3 GB
- Constellation ST91000640NS-40PK internal hard drive:1 TB
HDD speed
- 146.3GB 3.5:15000 RPM
- Constellation ST91000640NS-40PK internal hard drive:7200 RPM
HDD size
- 146.3GB 3.5:3.5"
- Constellation ST91000640NS-40PK internal hard drive:2.5"
Interface
- 146.3GB 3.5:SAS
- Constellation ST91000640NS-40PK internal hard drive:Serial ATA III
Storage drive buffer size
- 146.3GB 3.5:16 MB
- Constellation ST91000640NS-40PK internal hard drive:64 MB
Read seek time
- 146.3GB 3.5:3.4 ms
- Constellation ST91000640NS-40PK internal hard drive:8.5 ms
Write seek time
- 146.3GB 3.5:3.9 ms
- Constellation ST91000640NS-40PK internal hard drive:9.5 ms
Average latency
- 146.3GB 3.5:2 ms
- Constellation ST91000640NS-40PK internal hard drive:4.16 ms

Side by side

Differences highlightedShow differences only

Comparison of 146.3GB 3.5, ST91000640NS-40PK
30 specifications	A Seagate 146.3GB 3.5 View product	B Seagate Constellation ST91000640NS-40PK internal hard drive Model ST91000640NS-40PK View product
Features8 differ
HDD capacityDiffers	146.3 GB	1 TB
HDD speedDiffers	15000 RPM	7200 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	SAS	Serial ATA III
Type	HDD	HDD
Storage drive buffer sizeDiffers	16 MB	64 MB
Read seek timeDiffers	3.4 ms	8.5 ms
Write seek timeDiffers	3.9 ms	9.5 ms
Average latencyDiffers	2 ms	4.16 ms
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	1400000 h
Component forKnown for one	Server/workstation	Unknown — not stated by the source
HDD number of headsKnown for one	3	Unknown — not stated by the source
Power3 differ
Power consumption (typical)Differs	14.4 W	5.21 W
Power consumption (idle)Differs	9.6 W	3.31 W
Operating voltageDiffers	5 / 12 V	5 V
Operational conditions5 differ
Operating temperature (T-T)Differs	5 - 55 °C	5 - 60 °C
Operating vibrationDiffers	1 G	0.5 G
Non-operating vibrationDiffers	2 G	3 G
Operating shockDiffers	60 G	70 G
Non-operating shockDiffers	250 G	400 G
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Packaging contentidentical
ManualKnown for one	Unknown — not stated by the source	Yes
Quick start guideKnown for one	Unknown — not stated by the source	Yes
Weight & dimensions4 differ
WidthDiffers	101.6 mm	70.1 mm
DepthDiffers	146.1 mm	100.5 mm
HeightDiffers	25.4 mm	15 mm
WeightDiffers	674 g	200 g
Packaging dataidentical
Quantity per packKnown for one	Unknown — not stated by the source	40 pc(s)
Other featuresidentical
Data transfer rateKnown for one	Unknown — not stated by the source	6 Gbit/s
Logistics dataidentical
Harmonized System (HS) codeKnown for one	84717050	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.

More internal hard drive comparisons

All internal hard drive comparisons