Product comparison · 2 internal hard drives

Seagate 200GB 3.5" SATA II vs Seagate 20GB 3.5" Ultra ATA/100

28specifications compared
11differ
17identical
6known for one product only

Key differences

The Seagate 200GB 3.5" SATA II has 180 GB more HDD capacity than the Seagate 20GB 3.5" Ultra ATA/100 (200 GB vs 20 GB). The Seagate 200GB 3.5" SATA II has 1,800 RPM more HDD speed than the Seagate 20GB 3.5" Ultra ATA/100 (7200 RPM vs 5400 RPM). The Seagate 20GB 3.5" Ultra ATA/100 has 1.9 ms more read seek time than the Seagate 200GB 3.5" SATA II (9.9 ms vs 8 ms). Interface: Serial ATA II on the Seagate 200GB 3.5" SATA II, Ultra-ATA/100 on the Seagate 20GB 3.5" Ultra ATA/100. Operating altitude: -60.96 - 3048 m on the Seagate 200GB 3.5" SATA II, -198 - 304 m on the Seagate 20GB 3.5" Ultra ATA/100.

HDD capacity
- 200GB 3.5" SATA II:200 GB
- 20GB 3.5" Ultra ATA/100:20 GB
HDD speed
- 200GB 3.5" SATA II:7200 RPM
- 20GB 3.5" Ultra ATA/100:5400 RPM
Interface
- 200GB 3.5" SATA II:Serial ATA II
- 20GB 3.5" Ultra ATA/100:Ultra-ATA/100
Read seek time
- 200GB 3.5" SATA II:8 ms
- 20GB 3.5" Ultra ATA/100:9.9 ms
Write seek time
- 200GB 3.5" SATA II:9 ms
- 20GB 3.5" Ultra ATA/100:10.9 ms
Average latency
- 200GB 3.5" SATA II:4.16 ms
- 20GB 3.5" Ultra ATA/100:5.55 ms
Start-up current
- 200GB 3.5" SATA II:2.6 A
- 20GB 3.5" Ultra ATA/100:1.4 A
Operating altitude
- 200GB 3.5" SATA II:-60.96 - 3048 m
- 20GB 3.5" Ultra ATA/100:-198 - 304 m

Side by side

Differences highlightedShow differences only

Comparison of 200GB 3.5" SATA II, 20GB 3.5" Ultra ATA/100
34 specifications	A Seagate 200GB 3.5" SATA II View product	B Seagate 20GB 3.5" Ultra ATA/100 View product
Features6 differ
HDD capacityDiffers	200 GB	20 GB
HDD speedDiffers	7200 RPM	5400 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA II	Ultra-ATA/100
Type	HDD	HDD
HDD number of cylinders	16383	16383
HDD number of heads	16	16
Read seek timeDiffers	8 ms	9.9 ms
Write seek timeDiffers	9 ms	10.9 ms
Average latencyDiffers	4.16 ms	5.55 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Start/stop cycles	50000	50000
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	500000 h
Storage drive buffer sizeKnown for one	8 MB	Unknown — not stated by the source
Power1 differ
Power consumption (idle)Known for one	Unknown — not stated by the source	4.8 W
Power consumption (read)Known for one	Unknown — not stated by the source	7.1 W
Power consumption (write)Known for one	Unknown — not stated by the source	7.1 W
Operating voltage	5 / 12 V	5 / 12 V
Start-up currentDiffers	2.6 A	1.4 A
Operational conditions2 differ
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)	5 - 90%	5 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Operating altitudeDiffers	-60.96 - 3048 m	-198 - 304 m
Non-operating altitudeDiffers	-60.96 - 12192 m	-198 - 12192 m
Operating shock	63 G	63 G
Non-operating shock	350 G	350 G
Weight & dimensions2 differ
WidthDiffers	101.6 mm	101.8 mm
Depth	147 mm	147 mm
Height	26.1 mm	26.1 mm
WeightDiffers	580 g	590 g
Other featuresidentical
Drive devices burst data transfer rate (DMA)	2	2
Drive devices burst data transfer rate (PIO)	4	4
Drive devices burst data transfer rate (Ultra DMA)	5	5

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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