Product comparison · 2 internal hard drives

Seagate 1000GB 3.5 vs Seagate 20.4GB 5400RPM HDD

Key differences

HDD capacity
- 1000GB 3.5:1 TB
- 20.4GB 5400RPM HDD:20 GB
HDD speed
- 1000GB 3.5:7200 RPM
- 20.4GB 5400RPM HDD:5400 RPM
Interface
- 1000GB 3.5:Serial ATA II
- 20.4GB 5400RPM HDD:Ultra-ATA/100
Read seek time
- 1000GB 3.5:8.5 ms
- 20.4GB 5400RPM HDD:9.9 ms
Write seek time
- 1000GB 3.5:10 ms
- 20.4GB 5400RPM HDD:10.9 ms
Average latency
- 1000GB 3.5:4.16 ms
- 20.4GB 5400RPM HDD:5.55 ms
Mean time between failures (MTBF)
- 1000GB 3.5:750000 h
- 20.4GB 5400RPM HDD:500000 h
Width
- 1000GB 3.5:101.6 mm
- 20.4GB 5400RPM HDD:101.8 mm

Differences highlightedShow differences only

Comparison of 1000GB 3.5, 20.4GB 5400RPM HDD
22 specifications	A Seagate 1000GB 3.5 View product	B Seagate 20.4GB 5400RPM HDD View product
Features7 differ
HDD capacityDiffers	1 TB	20 GB
HDD speedDiffers	7200 RPM	5400 RPM
InterfaceDiffers	Serial ATA II	Ultra-ATA/100
Storage drive buffer sizeKnown for one	32 MB	Unknown — not stated by the source
Read seek timeDiffers	8.5 ms	9.9 ms
Write seek timeDiffers	10 ms	10.9 ms
Average latencyDiffers	4.16 ms	5.55 ms
Mean time between failures (MTBF)Differs	750000 h	500000 h
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
Bytes per sectorKnown for one	Unknown — not stated by the source	512
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 - 70 °C	Unknown — not stated by the source
Weight & dimensions2 differ
WidthDiffers	101.6 mm	101.8 mm
WeightDiffers	640 g	590 g
Other featuresidentical
Sustained data rateKnown for one	115 MB/s	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.