Product comparison · 2 internal hard drives

Samsung Spinpoint M HM120JC internal hard drive vs Seagate 20GB 3.5" Ultra ATA/100

13specifications compared
10differ
3identical
26known for one product only

Key differences

The Samsung Spinpoint M HM120JC internal hard drive has 100 GB more HDD capacity than the Seagate 20GB 3.5" Ultra ATA/100 (120 GB vs 20 GB). The Seagate 20GB 3.5" Ultra ATA/100 has 1" more HDD size than the Samsung Spinpoint M HM120JC internal hard drive (3.5" vs 2.5"). The Samsung Spinpoint M HM120JC internal hard drive has 0.05 ms more average latency than the Seagate 20GB 3.5" Ultra ATA/100 (5.6 ms vs 5.55 ms). Operating voltage: 5 V on the Samsung Spinpoint M HM120JC internal hard drive, 5 / 12 V on the Seagate 20GB 3.5" Ultra ATA/100.

HDD capacity
- Spinpoint M HM120JC internal hard drive:120 GB
- 20GB 3.5" Ultra ATA/100:20 GB
HDD size
- Spinpoint M HM120JC internal hard drive:2.5"
- 20GB 3.5" Ultra ATA/100:3.5"
Average latency
- Spinpoint M HM120JC internal hard drive:5.6 ms
- 20GB 3.5" Ultra ATA/100:5.55 ms
Start/stop cycles
- Spinpoint M HM120JC internal hard drive:600000
- 20GB 3.5" Ultra ATA/100:50000
Mean time between failures (MTBF)
- Spinpoint M HM120JC internal hard drive:330000 h
- 20GB 3.5" Ultra ATA/100:500000 h
Operating voltage
- Spinpoint M HM120JC internal hard drive:5 V
- 20GB 3.5" Ultra ATA/100:5 / 12 V
Width
- Spinpoint M HM120JC internal hard drive:100 mm
- 20GB 3.5" Ultra ATA/100:101.8 mm
Depth
- Spinpoint M HM120JC internal hard drive:70 mm
- 20GB 3.5" Ultra ATA/100:147 mm

Side by side

Differences highlightedShow differences only

Comparison of HM120JC, 20GB 3.5" Ultra ATA/100
39 specifications	A Samsung Spinpoint M HM120JC internal hard drive Model HM120JC View product	B Seagate 20GB 3.5" Ultra ATA/100 View product
Features5 differ
HDD capacityDiffers	120 GB	20 GB
HDD speed	5400 RPM	5400 RPM
HDD sizeDiffers	2.5"	3.5"
Interface	Ultra-ATA/100	Ultra-ATA/100
TypeKnown for one	Unknown — not stated by the source	HDD
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	9.9 ms
Write seek timeKnown for one	Unknown — not stated by the source	10.9 ms
Average latencyDiffers	5.6 ms	5.55 ms
Bytes per sector	512	512
Start/stop cyclesDiffers	600000	50000
Mean time between failures (MTBF)Differs	330000 h	500000 h
Storage drive buffer sizeKnown for one	8 MB	Unknown — not stated by the source
Track to track seek timeKnown for one	2 ms	Unknown — not stated by the source
Average seek timeKnown for one	12 ms	Unknown — not stated by the source
Power1 differ
Power consumption (idle)Known for one	Unknown — not stated by the source	4.8 W
Power consumption (read)Known for one	Unknown — not stated by the source	7.1 W
Power consumption (write)Known for one	Unknown — not stated by the source	7.1 W
Operating voltageDiffers	5 V	5 / 12 V
Start-up currentKnown for one	Unknown — not stated by the source	1.4 A
Operational conditionsidentical
Operating temperature (T-T)Known for one	Unknown — not stated by the source	0 - 60 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	-40 - 70 °C
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 90%
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	-198 - 304 m
Non-operating altitudeKnown for one	Unknown — not stated by the source	-198 - 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 & dimensions4 differ
WidthDiffers	100 mm	101.8 mm
DepthDiffers	70 mm	147 mm
HeightDiffers	9.4 mm	26.1 mm
WeightDiffers	100 g	590 g
Other featuresidentical
Drive devices burst data transfer rate (DMA)Known for one	Unknown — not stated by the source	2
Drive devices burst data transfer rate (PIO)Known for one	Unknown — not stated by the source	4
Drive devices burst data transfer rate (Ultra DMA)Known for one	Unknown — not stated by the source	5
HDD transfer rateKnown for one	431 Mbit/s	Unknown — not stated by the source
Drive device, transfer rateKnown for one	100 MB/s	Unknown — not stated by the source
InternalKnown for one	Yes	Unknown — not stated by the source

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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