Product comparison · 2 internal hard drives

Seagate 120GB 3.5" Ultra ATA/100 vs Seagate 160GB 3.5" SATA II

29specifications compared
5differ
24identical
6known for one product only

Key differences

The Seagate 160GB 3.5" SATA II has 40 GB more HDD capacity than the Seagate 120GB 3.5" Ultra ATA/100 (160 GB vs 120 GB). The Seagate 160GB 3.5" SATA II has 6 MB more storage drive buffer size than the Seagate 120GB 3.5" Ultra ATA/100 (8 MB vs 2 MB). The Seagate 120GB 3.5" Ultra ATA/100 has 3 ms more read seek time than the Seagate 160GB 3.5" SATA II (11 ms vs 8 ms). Interface: Ultra-ATA/100 on the Seagate 120GB 3.5" Ultra ATA/100, Serial ATA II on the Seagate 160GB 3.5" SATA II.

HDD capacity
- 120GB 3.5" Ultra ATA/100:120 GB
- 160GB 3.5" SATA II:160 GB
Interface
- 120GB 3.5" Ultra ATA/100:Ultra-ATA/100
- 160GB 3.5" SATA II:Serial ATA II
Storage drive buffer size
- 120GB 3.5" Ultra ATA/100:2 MB
- 160GB 3.5" SATA II:8 MB
Read seek time
- 120GB 3.5" Ultra ATA/100:11 ms
- 160GB 3.5" SATA II:8 ms
Write seek time
- 120GB 3.5" Ultra ATA/100:12 ms
- 160GB 3.5" SATA II:9 ms

Side by side

Differences highlightedShow differences only

Comparison of 120GB 3.5" Ultra ATA/100, 160GB 3.5" SATA II
35 specifications	A Seagate 120GB 3.5" Ultra ATA/100 View product	B Seagate 160GB 3.5" SATA II View product
Features5 differ
HDD capacityDiffers	120 GB	160 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 sizeDiffers	2 MB	8 MB
HDD number of cylinders	16383	16383
HDD number of heads	16	16
Read seek timeDiffers	11 ms	8 ms
Write seek timeDiffers	12 ms	9 ms
Average latency	4.16 ms	4.16 ms
Bytes per sector	512	512
Start/stop cycles	50000	50000
Poweridentical
Power consumption (idle)Known for one	2.5 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 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 shock	63 G	63 G
Non-operating shock	350 G	350 G
Weight & dimensionsidentical
Width	101.6 mm	101.6 mm
Depth	146.9 mm	146.9 mm
Height	26 mm	26 mm
Weight	580 g	580 g
Other featuresidentical
HDD transfer rateKnown for one	100 Mbit/s	Unknown — not stated by the source
Power requirementsKnown for one	2.6	Unknown — not stated by the source
Dimensions (WxDxH)Known for one	101.6 x 146.9 x 26.04 mm	Unknown — not stated by the source
InternalKnown for one	Yes	Unknown — not stated by the source
Drive devices burst data transfer rate (DMA)	2	2
Drive devices burst data transfer rate (PIO)	4	4
Drive devices burst data transfer rate (Ultra DMA)	5	5

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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