Product comparison · 2 internal hard drives

Seagate Constellation ST1000NC000-25PK internal hard drive vs Seagate Constellation ST91000640SS-30PK internal hard drive

18specifications compared
13differ
5identical
19known for one product only

Key differences

The Seagate Constellation ST1000NC000-25PK internal hard drive has 1" more HDD size than the Seagate Constellation ST91000640SS-30PK internal hard drive (3.5" vs 2.5"). The Seagate Constellation ST1000NC000-25PK internal hard drive has 1 ms more read seek time than the Seagate Constellation ST91000640SS-30PK internal hard drive (9.5 ms vs 8.5 ms). The Seagate Constellation ST1000NC000-25PK internal hard drive has 1 ms more write seek time than the Seagate Constellation ST91000640SS-30PK internal hard drive (10.5 ms vs 9.5 ms). Interface: Serial ATA III on the Seagate Constellation ST1000NC000-25PK internal hard drive, SAS on the Seagate Constellation ST91000640SS-30PK internal hard drive. Operating voltage: 5 / 12 V on the Seagate Constellation ST1000NC000-25PK internal hard drive, 5 V on the Seagate Constellation ST91000640SS-30PK internal hard drive.

HDD size
- Constellation ST1000NC000-25PK internal hard drive:3.5"
- Constellation ST91000640SS-30PK internal hard drive:2.5"
Interface
- Constellation ST1000NC000-25PK internal hard drive:Serial ATA III
- Constellation ST91000640SS-30PK internal hard drive:SAS
Read seek time
- Constellation ST1000NC000-25PK internal hard drive:9.5 ms
- Constellation ST91000640SS-30PK internal hard drive:8.5 ms
Write seek time
- Constellation ST1000NC000-25PK internal hard drive:10.5 ms
- Constellation ST91000640SS-30PK internal hard drive:9.5 ms
Mean time between failures (MTBF)
- Constellation ST1000NC000-25PK internal hard drive:800000 h
- Constellation ST91000640SS-30PK internal hard drive:1400000 h
Power consumption (typical)
- Constellation ST1000NC000-25PK internal hard drive:8 W
- Constellation ST91000640SS-30PK internal hard drive:6.35 W
Power consumption (idle)
- Constellation ST1000NC000-25PK internal hard drive:5.53 W
- Constellation ST91000640SS-30PK internal hard drive:3.85 W
Operating voltage
- Constellation ST1000NC000-25PK internal hard drive:5 / 12 V
- Constellation ST91000640SS-30PK internal hard drive:5 V

Side by side

Differences highlightedShow differences only

Comparison of ST1000NC000-25PK, ST91000640SS-30PK
37 specifications	A Seagate Constellation ST1000NC000-25PK internal hard drive Model ST1000NC000-25PK View product	B Seagate Constellation ST91000640SS-30PK internal hard drive Model ST91000640SS-30PK View product
Features5 differ
HDD capacity	1 TB	1 TB
HDD speed	7200 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 number of cylindersKnown for one	1	Unknown — not stated by the source
HDD number of headsKnown for one	2	Unknown — not stated by the source
Read seek timeDiffers	9.5 ms	8.5 ms
Write seek timeDiffers	10.5 ms	9.5 ms
SMART technologyKnown for one	Yes	Unknown — not stated by the source
Bytes per sectorKnown for one	4096	Unknown — not stated by the source
Start/stop cyclesKnown for one	300000	Unknown — not stated by the source
Mean time between failures (MTBF)Differs	800000 h	1400000 h
Component forKnown for one	Unknown — not stated by the source	Server/workstation
Average latencyKnown for one	Unknown — not stated by the source	4.16 ms
Power3 differ
Power consumption (typical)Differs	8 W	6.35 W
Power consumption (standby)Known for one	0.77 W	Unknown — not stated by the source
Power consumption (idle)Differs	5.53 W	3.85 W
Operating voltageDiffers	5 / 12 V	5 V
Operational conditionsidentical
Operating temperature (T-T)	5 - 60 °C	5 - 60 °C
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	5 - 90%	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
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
Packaging contentidentical
Bundled softwareKnown for one	SeaTools	Unknown — not stated by the source
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	101.8 mm	70.1 mm
DepthDiffers	147 mm	100.5 mm
HeightDiffers	20 mm	15 mm
WeightDiffers	400 g	200 g
Packaging data1 differ
Quantity per packDiffers	25 pc(s)	30 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.

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