Product comparison · 2 internal hard drives

Seagate 250GB 3.5 vs Seagate 400GB 3.5

Key differences

Differences highlightedShow differences only

Comparison of 250GB 3.5, 400GB 3.5
32 specifications	A Seagate 250GB 3.5 View product	B Seagate 400GB 3.5 View product
Features2 differ
HDD capacityDiffers	250.2 GB	400 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
Interface	Serial ATA II	Serial ATA II
Type	HDD	HDD
Storage drive buffer size	16 MB	16 MB
HDD number of headsDiffers	3	5
Read seek time	8.5 ms	8.5 ms
Write seek time	10 ms	10 ms
Track to track seek timeKnown for one	0.8 ms	Unknown — not stated by the source
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Start/stop cycles	50000	50000
HDD number of cylindersKnown for one	Unknown — not stated by the source	16383
Power1 differ
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentDiffers	2.8 A	2 A
Operational conditions2 differ
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)	5 - 90%	5 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating altitude	-60.96 - 3048 m	-60.96 - 3048 m
Non-operating altitude	-60.96 - 12192 m	-60.96 - 12192 m
Operating shockDiffers	63 G	68 G
Non-operating shockDiffers	350 G	300 G
Weight & dimensions1 differ
Width	101.6 mm	101.6 mm
Depth	147 mm	147 mm
Height	26.1 mm	26.1 mm
WeightDiffers	580 g	635 g
Logistics dataidentical
Harmonized System (HS) codeKnown for one	84717050	Unknown — not stated by the source
Other featuresidentical
Windows operating systems supported	Yes	Yes
Linux operating systems supported	Yes	Yes
Compatible productsKnown for one	PCs	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.