Product comparison · 2 internal hard drives

Seagate 120GB 3.5" Ultra ATA/100 vs Seagate 160GB 2.5" Ultra ATA/100

25specifications compared
16differ
9identical
15known for one product only

Key differences

The Seagate 160GB 2.5" Ultra ATA/100 has 40 GB more HDD capacity than the Seagate 120GB 3.5" Ultra ATA/100 (160 GB vs 120 GB). The Seagate 120GB 3.5" Ultra ATA/100 has 1,800 RPM more HDD speed than the Seagate 160GB 2.5" Ultra ATA/100 (7200 RPM vs 5400 RPM). The Seagate 120GB 3.5" Ultra ATA/100 has 1" more HDD size than the Seagate 160GB 2.5" Ultra ATA/100 (3.5" vs 2.5"). Operating voltage: 5 / 12 V on the Seagate 120GB 3.5" Ultra ATA/100, 5 V on the Seagate 160GB 2.5" Ultra ATA/100.

HDD capacity
- 120GB 3.5" Ultra ATA/100:120 GB
- 160GB 2.5" Ultra ATA/100:160 GB
HDD speed
- 120GB 3.5" Ultra ATA/100:7200 RPM
- 160GB 2.5" Ultra ATA/100:5400 RPM
HDD size
- 120GB 3.5" Ultra ATA/100:3.5"
- 160GB 2.5" Ultra ATA/100:2.5"
Storage drive buffer size
- 120GB 3.5" Ultra ATA/100:2 MB
- 160GB 2.5" Ultra ATA/100:8 MB
HDD number of heads
- 120GB 3.5" Ultra ATA/100:16
- 160GB 2.5" Ultra ATA/100:4
Read seek time
- 120GB 3.5" Ultra ATA/100:11 ms
- 160GB 2.5" Ultra ATA/100:12.5 ms
Write seek time
- 120GB 3.5" Ultra ATA/100:12 ms
- 160GB 2.5" Ultra ATA/100:13 ms
Average latency
- 120GB 3.5" Ultra ATA/100:4.16 ms
- 160GB 2.5" Ultra ATA/100:5.6 ms

Side by side

Differences highlightedShow differences only

Comparison of 120GB 3.5" Ultra ATA/100, 160GB 2.5" Ultra ATA/100
40 specifications	A Seagate 120GB 3.5" Ultra ATA/100 View product	B Seagate 160GB 2.5" Ultra ATA/100 View product
Features8 differ
HDD capacityDiffers	120 GB	160 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD sizeDiffers	3.5"	2.5"
Storage drive buffer sizeDiffers	2 MB	8 MB
HDD number of cylindersKnown for one	16383	Unknown — not stated by the source
HDD number of headsDiffers	16	4
Read seek timeDiffers	11 ms	12.5 ms
Write seek timeDiffers	12 ms	13 ms
Average latencyDiffers	4.16 ms	5.6 ms
Start/stop cyclesKnown for one	50000	Unknown — not stated by the source
Component forKnown for one	Unknown — not stated by the source	Laptop
Power2 differ
Power consumption (idle)Differs	2.5 W	0.8 W
Operating voltageDiffers	5 / 12 V	5 V
Power consumption (standby)Known for one	Unknown — not stated by the source	0.2 W
Power consumption (read)Known for one	Unknown — not stated by the source	2 W
Power consumption (write)Known for one	Unknown — not stated by the source	1.8 W
Start-up currentKnown for one	Unknown — not stated by the source	1 A
Operational conditions2 differ
Operating shockDiffers	63 G	350 G
Non-operating shockDiffers	350 G	900 G
Weight & dimensions4 differ
WidthDiffers	101.6 mm	69.8 mm
DepthDiffers	146.9 mm	100.2 mm
HeightDiffers	26 mm	9.5 mm
WeightDiffers	580 g	102 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)Known for one	2	Unknown — not stated by the source
Drive devices burst data transfer rate (PIO)Known for one	4	Unknown — not stated by the source
Drive devices burst data transfer rate (Ultra DMA)Known for one	5	Unknown — not stated by the source
Sustained data rateKnown for one	Unknown — not stated by the source	44 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.

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