Product comparison · 2 internal hard drives

Seagate 1000GB 3.5" SATA II vs Seagate 400GB 3.5" SAS

24specifications compared
11differ
13identical
7known for one product only

Key differences

HDD capacity
- 1000GB 3.5" SATA II:1 TB
- 400GB 3.5" SAS:400 GB
HDD speed
- 1000GB 3.5" SATA II:7200 RPM
- 400GB 3.5" SAS:10000 RPM
Interface
- 1000GB 3.5" SATA II:Serial ATA II
- 400GB 3.5" SAS:SAS
Storage drive buffer size
- 1000GB 3.5" SATA II:32 MB
- 400GB 3.5" SAS:16 MB
Read seek time
- 1000GB 3.5" SATA II:8.5 ms
- 400GB 3.5" SAS:3.9 ms
Write seek time
- 1000GB 3.5" SATA II:9.5 ms
- 400GB 3.5" SAS:4.2 ms
Track to track seek time
- 1000GB 3.5" SATA II:0.8 ms
- 400GB 3.5" SAS:0.35 ms
Average latency
- 1000GB 3.5" SATA II:4.16 ms
- 400GB 3.5" SAS:2.98 ms

Side by side

Differences highlightedShow differences only

Comparison of 1000GB 3.5" SATA II, 400GB 3.5" SAS
31 specifications	A Seagate 1000GB 3.5" SATA II View product	B Seagate 400GB 3.5" SAS View product
Features8 differ
HDD capacityDiffers	1 TB	400 GB
HDD speedDiffers	7200 RPM	10000 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA II	SAS
Type	HDD	HDD
Storage drive buffer sizeDiffers	32 MB	16 MB
Read seek timeDiffers	8.5 ms	3.9 ms
Write seek timeDiffers	9.5 ms	4.2 ms
Track to track seek timeDiffers	0.8 ms	0.35 ms
Average latencyDiffers	4.16 ms	2.98 ms
Bytes per sectorKnown for one	512	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	1200000 h	Unknown — not stated by the source
Component forKnown for one	Unknown — not stated by the source	Server/workstation
Poweridentical
Power consumption (typical)Known for one	11.6 W	Unknown — not stated by the source
Power consumption (idle)Known for one	8 W	Unknown — not stated by the source
Operating voltage	5 / 12 V	5 / 12 V
Operational conditionsidentical
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 shockKnown for one	63 G	Unknown — not stated by the source
Non-operating shockKnown for one	300 G	Unknown — not stated by the source
Weight & dimensions2 differ
WidthDiffers	101.6 mm	101.8 mm
Depth	147 mm	147 mm
Height	26.1 mm	26.1 mm
WeightDiffers	677 g	771 g
Other features1 differ
Windows operating systems supported	Yes	Yes
Linux operating systems supported	Yes	Yes
Sustained data rateDiffers	105 MB/s	97 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.

More internal hard drive comparisons

All internal hard drive comparisons