Product comparison · 2 internal hard drives

Samsung 400GB Ultra-ATA/133 HDD, 20-Pk vs Samsung 40GB SATA Hard Drive

20specifications compared
17differ
3identical
11known for one product only

Key differences

HDD capacity
- 400GB Ultra-ATA/133 HDD, 20-Pk:400 GB
- 40GB SATA Hard Drive:40 GB
HDD speed
- 400GB Ultra-ATA/133 HDD, 20-Pk:7200 RPM
- 40GB SATA Hard Drive:5400 RPM
HDD size
- 400GB Ultra-ATA/133 HDD, 20-Pk:3.5"
- 40GB SATA Hard Drive:2.5"
Interface
- 400GB Ultra-ATA/133 HDD, 20-Pk:Ultra-ATA/133
- 40GB SATA Hard Drive:Serial ATA
Full stroke seek time
- 400GB Ultra-ATA/133 HDD, 20-Pk:18 ms
- 40GB SATA Hard Drive:22 ms
Track to track seek time
- 400GB Ultra-ATA/133 HDD, 20-Pk:0.8 ms
- 40GB SATA Hard Drive:2 ms
Average seek time
- 400GB Ultra-ATA/133 HDD, 20-Pk:8.9 ms
- 40GB SATA Hard Drive:12 ms
Average latency
- 400GB Ultra-ATA/133 HDD, 20-Pk:4.17 ms
- 40GB SATA Hard Drive:5.6 ms

Side by side

Differences highlightedShow differences only

Comparison of 400GB Ultra-ATA/133 HDD, 20-Pk, 40GB SATA Hard Drive
31 specifications	A Samsung 400GB Ultra-ATA/133 HDD, 20-Pk View product	B Samsung 40GB SATA Hard Drive View product
Features10 differ
HDD capacityDiffers	400 GB	40 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	Ultra-ATA/133	Serial ATA
Storage drive buffer size	8 MB	8 MB
Full stroke seek timeDiffers	18 ms	22 ms
Track to track seek timeDiffers	0.8 ms	2 ms
Average seek timeDiffers	8.9 ms	12 ms
Average latencyDiffers	4.17 ms	5.6 ms
Bytes per sector	512	512
Start/stop cyclesDiffers	50000	600000
Mean time between failures (MTBF)Differs	600000 h	330000 h
Power1 differ
Power consumption (typical)Known for one	9.6 W	Unknown — not stated by the source
Power consumption (standby)Known for one	0.45 W	Unknown — not stated by the source
Operating voltageDiffers	5 / 12 V	5 V
Operational conditionsidentical
Operating temperature (T-T)Known for one	0 - 60 °C	Unknown — not stated by the source
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	5 - 90%	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Operating shockKnown for one	63 G	Unknown — not stated by the source
Non-operating shockKnown for one	300 G	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	147 mm	100 mm
DepthDiffers	101.6 mm	70 mm
HeightDiffers	26.1 mm	9.4 mm
WeightDiffers	651 g	100 g
Other features2 differ
Power requirementsKnown for one	+5V; +12V	Unknown — not stated by the source
Drive device, transfer rateDiffers	133 MB/s	150 MB/s
Drive ready timeDiffers	10 s	4 s
Internal	Yes	Yes
Acoustic pressure emissionsKnown for one	2.8 dB	Unknown — not stated by the source
HDD transfer rateKnown for one	Unknown — not stated by the source	428 Mbit/s

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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