Product comparison · 2 internal hard drives

Seagate Constellation.2 1TB vs Seagate Pipeline HD

16specifications compared
11differ
5identical
20known for one product only

Key differences

HDD speed
- Constellation.2 1TB:7200 RPM
- Pipeline HD:5900 RPM
Interface
- Constellation.2 1TB:Serial ATA III
- Pipeline HD:Serial ATA II
Read seek time
- Constellation.2 1TB:7.5 ms
- Pipeline HD:8.5 ms
Write seek time
- Constellation.2 1TB:8.5 ms
- Pipeline HD:9 ms
Average latency
- Constellation.2 1TB:4.16 ms
- Pipeline HD:5.1 ms
Operating temperature (T-T)
- Constellation.2 1TB:5 - 60 °C
- Pipeline HD:0 - 75 °C
Operating shock
- Constellation.2 1TB:70 G
- Pipeline HD:80 G
Non-operating shock
- Constellation.2 1TB:400 G
- Pipeline HD:350 G

Side by side

Differences highlightedShow differences only

Comparison of Constellation.2 1TB, Pipeline HD
36 specifications	A Seagate Constellation.2 1TB View product	B Seagate Pipeline HD View product
Features5 differ
HDD capacity	1 TB	1 TB
HDD speedDiffers	7200 RPM	5900 RPM
HDD sizeKnown for one	2.5"	Unknown — not stated by the source
InterfaceDiffers	Serial ATA III	Serial ATA II
Storage drive buffer size	64 MB	64 MB
HDD number of cylindersKnown for one	16383	Unknown — not stated by the source
Read seek timeDiffers	7.5 ms	8.5 ms
Write seek timeDiffers	8.5 ms	9 ms
Track to track seek timeKnown for one	0.44 ms	Unknown — not stated by the source
Average latencyDiffers	4.16 ms	5.1 ms
Bytes per sectorKnown for one	512	Unknown — not stated by the source
Poweridentical
Operating voltageKnown for one	5 V	Unknown — not stated by the source
Start-up current	2 A	2 A
Power consumption (typical)Known for one	Unknown — not stated by the source	0.145 W
Power consumption (idle)Known for one	Unknown — not stated by the source	0.145 W
Operational conditions3 differ
Operating temperature (T-T)Differs	5 - 60 °C	0 - 75 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)Known for one	5 - 95%	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	0.5 G	Unknown — not stated by the source
Non-operating vibrationKnown for one	3 G	Unknown — not stated by the source
Operating altitudeKnown for one	-60.96 - 3048 m	Unknown — not stated by the source
Non-operating altitudeKnown for one	-60.96 - 12195 m	Unknown — not stated by the source
Operating shockDiffers	70 G	80 G
Non-operating shockDiffers	400 G	350 G
Weight & dimensions1 differ
WeightDiffers	200 g	415 g
WidthKnown for one	Unknown — not stated by the source	101.6 mm
DepthKnown for one	Unknown — not stated by the source	147 mm
HeightKnown for one	Unknown — not stated by the source	20.2 mm
Other features2 differ
Product colourKnown for one	Black	Unknown — not stated by the source
Data transfer rateDiffers	6 Gbit/s	3 Gbit/s
Drive ready timeKnown for one	20 s	Unknown — not stated by the source
Internal	Yes	Yes
Recording densityKnown for one	1544 kbit/inch	Unknown — not stated by the source
Track densityDiffers	270 Ktracks/inch	625Gb/in2
Sustained data rateKnown for one	Unknown — not stated by the source	268.4 MB/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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