Product comparison · 2 internal hard drives

Seagate 40GB Serial ATA vs Seagate EE25.2 Series™ 2.5-inch HD 30GB PATA

17specifications compared
7differ
10identical
22known for one product only

Key differences

The Seagate 40GB Serial ATA has 10 GB more HDD capacity than the Seagate EE25.2 Series™ 2.5-inch HD 30GB PATA (40 GB vs 30 GB). The Seagate 40GB Serial ATA has 1.5 ms more average seek time than the Seagate EE25.2 Series™ 2.5-inch HD 30GB PATA (12.5 ms vs 11 ms). The Seagate 40GB Serial ATA has 0.1 ms more average latency than the Seagate EE25.2 Series™ 2.5-inch HD 30GB PATA (5.6 ms vs 5.5 ms). Interface: Serial ATA on the Seagate 40GB Serial ATA, IDE/ATA on the Seagate EE25.2 Series™ 2.5-inch HD 30GB PATA. Operating temperature (T-T): -30 - 85 °C on the Seagate 40GB Serial ATA, 30 - 85 °C on the Seagate EE25.2 Series™ 2.5-inch HD 30GB PATA.

HDD capacity
- 40GB Serial ATA:40 GB
- EE25.2 Series™ 2.5-inch HD 30GB PATA:30 GB
Interface
- 40GB Serial ATA:Serial ATA
- EE25.2 Series™ 2.5-inch HD 30GB PATA:IDE/ATA
Average seek time
- 40GB Serial ATA:12.5 ms
- EE25.2 Series™ 2.5-inch HD 30GB PATA:11 ms
Average latency
- 40GB Serial ATA:5.6 ms
- EE25.2 Series™ 2.5-inch HD 30GB PATA:5.5 ms
Operating temperature (T-T)
- 40GB Serial ATA:-30 - 85 °C
- EE25.2 Series™ 2.5-inch HD 30GB PATA:30 - 85 °C
Storage temperature (T-T)
- 40GB Serial ATA:-40 - 95 °C
- EE25.2 Series™ 2.5-inch HD 30GB PATA:40 - 95 °C
Non-operating altitude
- 40GB Serial ATA:-304.8 - 12192 m
- EE25.2 Series™ 2.5-inch HD 30GB PATA:15000

Side by side

Differences highlightedShow differences only

Comparison of 40GB Serial ATA, EE25.2 Series™ 2.5-inch HD 30GB PATA
39 specifications	A Seagate 40GB Serial ATA View product	B Seagate EE25.2 Series™ 2.5-inch HD 30GB PATA View product
Features4 differ
HDD capacityDiffers	40 GB	30 GB
HDD speed	5400 RPM	5400 RPM
HDD size	2.5"	2.5"
InterfaceDiffers	Serial ATA	IDE/ATA
TypeKnown for one	HDD	Unknown — not stated by the source
Storage drive buffer size	8 MB	8 MB
HDD number of headsKnown for one	1	Unknown — not stated by the source
Read seek timeKnown for one	13 ms	Unknown — not stated by the source
Write seek timeKnown for one	14 ms	Unknown — not stated by the source
Full stroke seek timeKnown for one	23 ms	Unknown — not stated by the source
Track to track seek timeKnown for one	1.5 ms	Unknown — not stated by the source
Average seek timeDiffers	12.5 ms	11 ms
Average latencyDiffers	5.6 ms	5.5 ms
Bytes per sectorKnown for one	512	Unknown — not stated by the source
Start/stop cyclesKnown for one	300000	Unknown — not stated by the source
Poweridentical
Power consumption (standby)Known for one	0.26 W	Unknown — not stated by the source
Power consumption (PowerSave)Known for one	0.26 W	Unknown — not stated by the source
Power consumption (idle)Known for one	1.65 W	Unknown — not stated by the source
Power consumption (read)Known for one	1.4 W	Unknown — not stated by the source
Power consumption (write)Known for one	1.5 W	Unknown — not stated by the source
Operating voltage	5 V	5 V
Start-up currentKnown for one	1.3 A	Unknown — not stated by the source
Operational conditions3 differ
Operating temperature (T-T)Differs	-30 - 85 °C	30 - 85 °C
Storage temperature (T-T)Differs	-40 - 95 °C	40 - 95 °C
Operating relative humidity (H-H)	5 - 90%	5 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating vibrationKnown for one	2 G	Unknown — not stated by the source
Non-operating vibrationKnown for one	5 G	Unknown — not stated by the source
Operating altitudeKnown for one	-304.8 - 5500 m	Unknown — not stated by the source
Non-operating altitudeDiffers	-304.8 - 12192 m	15000
Operating shockKnown for one	300 G	Unknown — not stated by the source
Non-operating shockKnown for one	900 G	Unknown — not stated by the source
Weight & dimensionsidentical
Width	69.8 mm	69.8 mm
Depth	100.2 mm	100.2 mm
Height	9.5 mm	9.5 mm
Weight	102 g	102 g
Packaging dataidentical
Quantity per packKnown for one	1 pc(s)	Unknown — not stated by the source
Other featuresidentical
Windows operating systems supportedKnown for one	Yes	Unknown — not stated by the source
InternalKnown for one	Unknown — not stated by the source	Yes

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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