Product comparison · 2 internal hard drives

Fujitsu MHZ2120BJ - 120 GB, 2.5", 7200 RPM vs Seagate 640GB 3.5'' SATA II

12specifications compared
9differ
3identical
17known for one product only

Key differences

The Seagate 640GB 3.5'' SATA II has 520 GB more HDD capacity than the Fujitsu MHZ2120BJ - 120 GB, 2.5", 7200 RPM (640 GB vs 120 GB). The Seagate 640GB 3.5'' SATA II has 1" more HDD size than the Fujitsu MHZ2120BJ - 120 GB, 2.5", 7200 RPM (3.5" vs 2.5"). The Seagate 640GB 3.5'' SATA II has 16 MB more storage drive buffer size than the Fujitsu MHZ2120BJ - 120 GB, 2.5", 7200 RPM (32 MB vs 16 MB). Interface: Serial ATA on the Fujitsu MHZ2120BJ - 120 GB, 2.5", 7200 RPM, Serial ATA II on the Seagate 640GB 3.5'' SATA II. Operating voltage: 5 V on the Fujitsu MHZ2120BJ - 120 GB, 2.5", 7200 RPM, 5 / 12 V on the Seagate 640GB 3.5'' SATA II.

HDD capacity
- MHZ2120BJ - 120 GB, 2.5", 7200 RPM:120 GB
- 640GB 3.5'' SATA II:640 GB
HDD size
- MHZ2120BJ - 120 GB, 2.5", 7200 RPM:2.5"
- 640GB 3.5'' SATA II:3.5"
Interface
- MHZ2120BJ - 120 GB, 2.5", 7200 RPM:Serial ATA
- 640GB 3.5'' SATA II:Serial ATA II
Storage drive buffer size
- MHZ2120BJ - 120 GB, 2.5", 7200 RPM:16 MB
- 640GB 3.5'' SATA II:32 MB
Operating voltage
- MHZ2120BJ - 120 GB, 2.5", 7200 RPM:5 V
- 640GB 3.5'' SATA II:5 / 12 V
Width
- MHZ2120BJ - 120 GB, 2.5", 7200 RPM:700 mm
- 640GB 3.5'' SATA II:101.6 mm
Depth
- MHZ2120BJ - 120 GB, 2.5", 7200 RPM:100 mm
- 640GB 3.5'' SATA II:147 mm
Height
- MHZ2120BJ - 120 GB, 2.5", 7200 RPM:9.5 mm
- 640GB 3.5'' SATA II:26.1 mm

Side by side

Differences highlightedShow differences only

Comparison of MHZ2120BJ - 120 GB, 2.5", 7200 RPM, 640GB 3.5'' SATA II
29 specifications	A Fujitsu MHZ2120BJ - 120 GB, 2.5", 7200 RPM View product	B Seagate 640GB 3.5'' SATA II View product
Features4 differ
HDD capacityDiffers	120 GB	640 GB
HDD sizeDiffers	2.5"	3.5"
InterfaceDiffers	Serial ATA	Serial ATA II
Storage drive buffer sizeDiffers	16 MB	32 MB
Read seek timeKnown for one	10.5 ms	Unknown — not stated by the source
Write seek timeKnown for one	12.5 ms	Unknown — not stated by the source
Track to track seek timeKnown for one	1.5 ms	Unknown — not stated by the source
Average latencyKnown for one	4.17 ms	Unknown — not stated by the source
Bytes per sectorKnown for one	512	Unknown — not stated by the source
TypeKnown for one	Unknown — not stated by the source	HDD
Start/stop cyclesKnown for one	Unknown — not stated by the source	50000
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	750000 h
Power1 differ
Operating voltageDiffers	5 V	5 / 12 V
Operational conditionsidentical
Operating temperature (T-T)Known for one	5 - 55 °C	Unknown — not stated by the source
Storage temperature (T-T)Known for one	-40 - 65 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	8 - 90%	Unknown — not stated by the source
Operating vibrationKnown for one	9.8 G	Unknown — not stated by the source
Non-operating vibrationKnown for one	49 G	Unknown — not stated by the source
Operating altitudeKnown for one	-300 - 3000 m	Unknown — not stated by the source
Non-operating altitudeKnown for one	-300 - 12000 m	Unknown — not stated by the source
Operating shockKnown for one	325 G	Unknown — not stated by the source
Non-operating shockKnown for one	900 G	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	700 mm	101.6 mm
DepthDiffers	100 mm	147 mm
HeightDiffers	9.5 mm	26.1 mm
WeightDiffers	116 g	380 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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