Product comparison · 2 internal hard drives

Seagate Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100 vs Seagate 40GB 3.5

17specifications compared
16differ
1identical
26known for one product only

Key differences

HDD capacity
- Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100:100 GB
- 40GB 3.5:40 GB
HDD speed
- Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100:5400 RPM
- 40GB 3.5:7200 RPM
HDD size
- Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100:2.5"
- 40GB 3.5:3.5"
Storage drive buffer size
- Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100:8 MB
- 40GB 3.5:2 MB
HDD number of cylinders
- Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100:1024
- 40GB 3.5:16383
HDD number of heads
- Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100:256
- 40GB 3.5:16
Read seek time
- Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100:22 ms
- 40GB 3.5:11 ms
Write seek time
- Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100:24 ms
- 40GB 3.5:12 ms

Side by side

Differences highlightedShow differences only

Comparison of 100GB, 40GB 3.5
43 specifications	A Seagate Momentus 100GB internal hard drive 5400 RPM 8 MB 2.5" Ultra-ATA/100 Model 100GB View product	B Seagate 40GB 3.5 View product
Features9 differ
HDD capacityDiffers	100 GB	40 GB
HDD speedDiffers	5400 RPM	7200 RPM
HDD sizeDiffers	2.5"	3.5"
Interface	Ultra-ATA/100	Ultra-ATA/100
TypeKnown for one	Unknown — not stated by the source	HDD
Storage drive buffer sizeDiffers	8 MB	2 MB
HDD number of cylindersDiffers	1024	16383
HDD number of headsDiffers	256	16
Read seek timeDiffers	22 ms	11 ms
Write seek timeDiffers	24 ms	12 ms
Average latencyDiffers	5.6 ms	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Start/stop cyclesKnown for one	Unknown — not stated by the source	50000
Component forKnown for one	Laptop	Unknown — not stated by the source
Average seek timeKnown for one	11 ms	Unknown — not stated by the source
Power2 differ
Operating voltageDiffers	5 V	5 / 12 V
Start-up currentDiffers	1 A	2.8 A
Power consumption (standby)Known for one	0.2 W	Unknown — not stated by the source
Operational conditions1 differ
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	-60.96 - 3048 m
Non-operating altitudeKnown for one	Unknown — not stated by the source	-60.96 - 12192 m
Operating shockDiffers	350 G	63 G
Non-operating shockKnown for one	Unknown — not stated by the source	350 G
Packaging contentidentical
Storage drive adapter includedKnown for one	Unknown — not stated by the source	No
Weight & dimensions4 differ
WidthDiffers	69.8 mm	101.6 mm
DepthDiffers	100.2 mm	146.9 mm
HeightDiffers	9.5 mm	26 mm
WeightDiffers	102 g	580 g
Packaging dataidentical
Quantity per packKnown for one	Unknown — not stated by the source	1 pc(s)
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
Dimensions (WxDxH)Known for one	69.85 x 100.2 x 9.5 mm	Unknown — not stated by the source
Drive device, transfer rateKnown for one	100 MB/s	Unknown — not stated by the source
External power adapterKnown for one	No	Unknown — not stated by the source
InternalKnown for one	Yes	Unknown — not stated by the source
Mac compatibilityKnown for one	No	Unknown — not stated by the source
Maximum data transfer rateKnown for one	352 Mbit/s	Unknown — not stated by the source
Plug and PlayKnown for one	Yes	Unknown — not stated by the source
USB poweredKnown for one	No	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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