Product comparison · 2 internal hard drives

Samsung 400GB HDD vs Seagate 250GB 3.5" SATA II

22specifications compared
9differ
13identical
16known for one product only

Key differences

The Samsung 400GB HDD has 150 GB more HDD capacity than the Seagate 250GB 3.5" SATA II (400 GB vs 250 GB). The Samsung 400GB HDD has 0.01 ms more average latency than the Seagate 250GB 3.5" SATA II (4.17 ms vs 4.16 ms). The Seagate 250GB 3.5" SATA II has 50 G more non-operating shock than the Samsung 400GB HDD (350 G vs 300 G). Interface: Ultra-ATA/100 on the Samsung 400GB HDD, Serial ATA II on the Seagate 250GB 3.5" SATA II. Operating altitude: -304.8 - 3048 m on the Samsung 400GB HDD, -60.96 - 3048 m on the Seagate 250GB 3.5" SATA II.

HDD capacity
- 400GB HDD:400 GB
- 250GB 3.5" SATA II:250 GB
Interface
- 400GB HDD:Ultra-ATA/100
- 250GB 3.5" SATA II:Serial ATA II
Average latency
- 400GB HDD:4.17 ms
- 250GB 3.5" SATA II:4.16 ms
Operating altitude
- 400GB HDD:-304.8 - 3048 m
- 250GB 3.5" SATA II:-60.96 - 3048 m
Non-operating altitude
- 400GB HDD:-304.8 - 12192 m
- 250GB 3.5" SATA II:-60.96 - 12192 m
Non-operating shock
- 400GB HDD:300 G
- 250GB 3.5" SATA II:350 G
Depth
- 400GB HDD:146.1 mm
- 250GB 3.5" SATA II:147 mm
Height
- 400GB HDD:25.4 mm
- 250GB 3.5" SATA II:26.1 mm

Side by side

Differences highlightedShow differences only

Comparison of 400GB HDD, 250GB 3.5" SATA II
38 specifications	A Samsung 400GB HDD View product	B Seagate 250GB 3.5" SATA II View product
Features3 differ
HDD capacityDiffers	400 GB	250 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Ultra-ATA/100	Serial ATA II
Type	HDD	HDD
Storage drive buffer size	8 MB	8 MB
Full stroke seek timeKnown for one	18 ms	Unknown — not stated by the source
Track to track seek timeKnown for one	0.8 ms	Unknown — not stated by the source
Average seek timeKnown for one	8.9 ms	Unknown — not stated by the source
Average latencyDiffers	4.17 ms	4.16 ms
Bytes per sector	512	512
Start/stop cycles	50000	50000
Mean time between failures (MTBF)Known for one	600000 h	Unknown — not stated by the source
HDD number of cylindersKnown for one	Unknown — not stated by the source	16383
HDD number of headsKnown for one	Unknown — not stated by the source	16
Read seek timeKnown for one	Unknown — not stated by the source	8 ms
Write seek timeKnown for one	Unknown — not stated by the source	9 ms
Poweridentical
Power consumption (typical)Known for one	8.7 W	Unknown — not stated by the source
Power consumption (standby)Known for one	0.6 W	Unknown — not stated by the source
Power consumption (PowerSave)Known for one	0.6 W	Unknown — not stated by the source
Power consumption (idle)Known for one	7.2 W	Unknown — not stated by the source
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentKnown for one	Unknown — not stated by the source	2.6 A
Operational conditions3 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 vibrationKnown for one	1 G	Unknown — not stated by the source
Non-operating vibrationKnown for one	2 G	Unknown — not stated by the source
Operating altitudeDiffers	-304.8 - 3048 m	-60.96 - 3048 m
Non-operating altitudeDiffers	-304.8 - 12192 m	-60.96 - 12192 m
Operating shock	63 G	63 G
Non-operating shockDiffers	300 G	350 G
Weight & dimensions3 differ
Width	101.6 mm	101.6 mm
DepthDiffers	146.1 mm	147 mm
HeightDiffers	25.4 mm	26.1 mm
WeightDiffers	653 g	580 g
Other featuresidentical
Drive ready timeKnown for one	10 s	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.

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