Product comparison · 2 internal hard drives

Seagate 18.2GB 3.5" SCSI vs Seagate 250GB 3.5" SATA II

18specifications compared
7differ
11identical
10known for one product only

Key differences

The Seagate 250GB 3.5" SATA II has 232 GB more HDD capacity than the Seagate 18.2GB 3.5" SCSI (250 GB vs 18 GB). The Seagate 250GB 3.5" SATA II has 4 MB more storage drive buffer size than the Seagate 18.2GB 3.5" SCSI (8 MB vs 4 MB). The Seagate 18.2GB 3.5" SCSI has 0.54 ms more average latency than the Seagate 250GB 3.5" SATA II (4.7 ms vs 4.16 ms). Interface: SCSI on the Seagate 18.2GB 3.5" SCSI, Serial ATA II on the Seagate 250GB 3.5" SATA II.

HDD capacity
- 18.2GB 3.5" SCSI:18 GB
- 250GB 3.5" SATA II:250 GB
Interface
- 18.2GB 3.5" SCSI:SCSI
- 250GB 3.5" SATA II:Serial ATA II
Storage drive buffer size
- 18.2GB 3.5" SCSI:4 MB
- 250GB 3.5" SATA II:8 MB
Average latency
- 18.2GB 3.5" SCSI:4.7 ms
- 250GB 3.5" SATA II:4.16 ms
Depth
- 18.2GB 3.5" SCSI:146 mm
- 250GB 3.5" SATA II:147 mm
Height
- 18.2GB 3.5" SCSI:25.4 mm
- 250GB 3.5" SATA II:26.1 mm
Weight
- 18.2GB 3.5" SCSI:680 g
- 250GB 3.5" SATA II:580 g

Side by side

Differences highlightedShow differences only

Comparison of 18.2GB 3.5" SCSI, 250GB 3.5" SATA II
28 specifications	A Seagate 18.2GB 3.5" SCSI View product	B Seagate 250GB 3.5" SATA II View product
Features4 differ
HDD capacityDiffers	18 GB	250 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	SCSI	Serial ATA II
Type	HDD	HDD
Storage drive buffer sizeDiffers	4 MB	8 MB
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
Average latencyDiffers	4.7 ms	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Start/stop cyclesKnown for one	Unknown — not stated by the source	50000
Component forKnown for one	Server/workstation	Unknown — not stated by the source
Poweridentical
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentKnown for one	Unknown — not stated by the source	2.6 A
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	Unknown — not stated by the source	63 G
Non-operating shockKnown for one	Unknown — not stated by the source	350 G
Weight & dimensions3 differ
Width	101.6 mm	101.6 mm
DepthDiffers	146 mm	147 mm
HeightDiffers	25.4 mm	26.1 mm
WeightDiffers	680 g	580 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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