Product comparison · 2 internal hard drives

Lenovo ThinkPad 250GB 5400rpm Serial ATA Hard drive vs Seagate EE25 Series 20GB SATA 25pk

10specifications compared
7differ
3identical
18known for one product only

Key differences

The Lenovo ThinkPad 250GB 5400rpm Serial ATA Hard drive has 230 GB more HDD capacity than the Seagate EE25 Series 20GB SATA 25pk (250 GB vs 20 GB). The Seagate EE25 Series 20GB SATA 25pk has 1.5 ms more read seek time than the Lenovo ThinkPad 250GB 5400rpm Serial ATA Hard drive (12.5 ms vs 11 ms). The Seagate EE25 Series 20GB SATA 25pk has 1.5 ms more write seek time than the Lenovo ThinkPad 250GB 5400rpm Serial ATA Hard drive (14.5 ms vs 13 ms).

HDD capacity
- ThinkPad 250GB 5400rpm Serial ATA Hard drive:250 GB
- EE25 Series 20GB SATA 25pk:20 GB
Read seek time
- ThinkPad 250GB 5400rpm Serial ATA Hard drive:11 ms
- EE25 Series 20GB SATA 25pk:12.5 ms
Write seek time
- ThinkPad 250GB 5400rpm Serial ATA Hard drive:13 ms
- EE25 Series 20GB SATA 25pk:14.5 ms
Average latency
- ThinkPad 250GB 5400rpm Serial ATA Hard drive:5.5 ms
- EE25 Series 20GB SATA 25pk:5.6 ms
Operating shock
- ThinkPad 250GB 5400rpm Serial ATA Hard drive:1000 G
- EE25 Series 20GB SATA 25pk:200 G
Non-operating shock
- ThinkPad 250GB 5400rpm Serial ATA Hard drive:350 G
- EE25 Series 20GB SATA 25pk:800 G
Weight
- ThinkPad 250GB 5400rpm Serial ATA Hard drive:102 g
- EE25 Series 20GB SATA 25pk:100 g

Side by side

Differences highlightedShow differences only

Comparison of ThinkPad 250GB 5400rpm Serial ATA Hard drive, EE25 Series 20GB SATA 25pk
28 specifications	A Lenovo ThinkPad 250GB 5400rpm Serial ATA Hard drive View product	B Seagate EE25 Series 20GB SATA 25pk View product
Features4 differ
HDD capacityDiffers	250 GB	20 GB
HDD speed	5400 RPM	5400 RPM
HDD sizeKnown for one	Unknown — not stated by the source	2.5"
Interface	Serial ATA	Serial ATA
Storage drive buffer sizeKnown for one	Unknown — not stated by the source	8 MB
Read seek timeDiffers	11 ms	12.5 ms
Write seek timeDiffers	13 ms	14.5 ms
Average latencyDiffers	5.5 ms	5.6 ms
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	550000 h
HDD number of headsKnown for one	4	Unknown — not stated by the source
Bytes per sectorKnown for one	512	Unknown — not stated by the source
Poweridentical
Operating voltageKnown for one	Unknown — not stated by the source	5 V
Operational conditions2 differ
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Storage relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Operating shockDiffers	1000 G	200 G
Non-operating shockDiffers	350 G	800 G
Weight & dimensions1 differ
WidthKnown for one	Unknown — not stated by the source	69.8 mm
DepthKnown for one	Unknown — not stated by the source	100.2 mm
HeightKnown for one	Unknown — not stated by the source	9.5 mm
WeightDiffers	102 g	100 g
Other featuresidentical
Internal	Yes	Yes
Acoustic pressure emissionsKnown for one	Unknown — not stated by the source	2.3 dB
Dimensions (WxDxH)Known for one	69.85 x 100.2 x 9.5 mm	Unknown — not stated by the source
Compatible operating systemsKnown for one	Microsoft Windows 2000 Windows XP Windows Vista	Unknown — not stated by the source
Data transfer rateKnown for one	1.5 Gbit/s	Unknown — not stated by the source
Mac compatibilityKnown for one	No	Unknown — not stated by the source
Maximum data transfer rateKnown for one	665 Mbit/s	Unknown — not stated by the source
CertificationKnown for one	CE, UL, MIC, TUV, BSMI, C-Tick, CUL, RoHS	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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