Product comparison · 2 internal hard drives

Seagate 146GB 2.5" SAS vs Seagate 500GB 3.5" SATA III

21specifications compared
16differ
5identical
10known for one product only

Key differences

The Seagate 500GB 3.5" SATA III has 354 GB more HDD capacity than the Seagate 146GB 2.5" SAS (500 GB vs 146 GB). The Seagate 146GB 2.5" SAS has 2,800 RPM more HDD speed than the Seagate 500GB 3.5" SATA III (10000 RPM vs 7200 RPM). The Seagate 500GB 3.5" SATA III has 1" more HDD size than the Seagate 146GB 2.5" SAS (3.5" vs 2.5"). Interface: SAS on the Seagate 146GB 2.5" SAS, Serial ATA III on the Seagate 500GB 3.5" SATA III. Operating voltage: 5 V on the Seagate 146GB 2.5" SAS, 5 / 12 V on the Seagate 500GB 3.5" SATA III.

HDD capacity
- 146GB 2.5" SAS:146 GB
- 500GB 3.5" SATA III:500 GB
HDD speed
- 146GB 2.5" SAS:10000 RPM
- 500GB 3.5" SATA III:7200 RPM
HDD size
- 146GB 2.5" SAS:2.5"
- 500GB 3.5" SATA III:3.5"
Interface
- 146GB 2.5" SAS:SAS
- 500GB 3.5" SATA III:Serial ATA III
Read seek time
- 146GB 2.5" SAS:3.6 ms
- 500GB 3.5" SATA III:8.5 ms
Write seek time
- 146GB 2.5" SAS:4.2 ms
- 500GB 3.5" SATA III:9.5 ms
Average latency
- 146GB 2.5" SAS:3 ms
- 500GB 3.5" SATA III:4.16 ms
Operating voltage
- 146GB 2.5" SAS:5 V
- 500GB 3.5" SATA III:5 / 12 V

Side by side

Differences highlightedShow differences only

Comparison of 146GB 2.5" SAS, 500GB 3.5" SATA III
31 specifications	A Seagate 146GB 2.5" SAS View product	B Seagate 500GB 3.5" SATA III View product
Features7 differ
HDD capacityDiffers	146 GB	500 GB
HDD speedDiffers	10000 RPM	7200 RPM
HDD sizeDiffers	2.5"	3.5"
InterfaceDiffers	SAS	Serial ATA III
Type	HDD	HDD
Component forKnown for one	Server/workstation	Unknown — not stated by the source
Storage drive buffer size	16 MB	16 MB
HDD number of heads	2	2
Read seek timeDiffers	3.6 ms	8.5 ms
Write seek timeDiffers	4.2 ms	9.5 ms
Average latencyDiffers	3 ms	4.16 ms
Bytes per sector	512	512
Mean time between failures (MTBF)Known for one	1600000 h	Unknown — not stated by the source
Start/stop cyclesKnown for one	Unknown — not stated by the source	50000
Power2 differ
Power consumption (idle)Known for one	3.2 W	Unknown — not stated by the source
Operating voltageDiffers	5 V	5 / 12 V
Start-up currentDiffers	2.00 A	2 A
Operational conditions3 differ
Operating temperature (T-T)Differs	5 - 55 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating vibrationKnown for one	0.5 G	Unknown — not stated by the source
Non-operating vibrationKnown for one	2.4 G	Unknown — not stated by the source
Operating shockDiffers	60 G	70 G
Non-operating shockDiffers	300 G	350 G
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Storage relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Operating altitudeKnown for one	Unknown — not stated by the source	-304.8 - 3048 m
Non-operating altitudeKnown for one	Unknown — not stated by the source	-304.8 - 12192 m
Weight & dimensions4 differ
WidthDiffers	70 mm	101.6 mm
DepthDiffers	100.5 mm	147 mm
HeightDiffers	14.8 mm	20 mm
WeightDiffers	227 g	415 g

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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