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 sizeDiffers	3.5"	2.5"
InterfaceDiffers	Serial ATA III	SAS
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
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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