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Product comparison · 2 internal hard drives

Seagate 20GB 3.5" Ultra ATA/100 vs Seagate 300GB 3.5" SATA

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  • 19specifications compared
  • 8differ
  • 11identical
  • 19known for one product only

Key differences

The Seagate 300GB 3.5" SATA has 280 GB more HDD capacity than the Seagate 20GB 3.5" Ultra ATA/100 (300 GB vs 20 GB). The Seagate 300GB 3.5" SATA 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 1.39 ms more average latency than the Seagate 300GB 3.5" SATA (5.55 ms vs 4.16 ms). Interface: Ultra-ATA/100 on the Seagate 20GB 3.5" Ultra ATA/100, Serial ATA on the Seagate 300GB 3.5" SATA. Operating altitude: -198 - 304 m on the Seagate 20GB 3.5" Ultra ATA/100, -60.96 - 3048 m on the Seagate 300GB 3.5" SATA.

  • HDD capacity
    • 20 GB
    • 300 GB
  • HDD speed
    • 5400 RPM
    • 7200 RPM
  • Interface
    • Ultra-ATA/100
    • Serial ATA
  • Average latency
    • 5.55 ms
    • 4.16 ms
  • Operating altitude
    • -198 - 304 m
    • -60.96 - 3048 m
  • Non-operating altitude
    • -198 - 12192 m
    • -60.96 - 12192 m
  • Non-operating shock
    • 350 G
    • 300 G
  • Weight
    • 590 g
    • 635 g

Side by side

Differences highlightedShow differences only
38 specifications
A

Seagate

20GB 3.5" Ultra ATA/100View product
B

Seagate

300GB 3.5" SATAView product
Features4 differ
HDD capacityDiffers20 GB300 GB
HDD speedDiffers5400 RPM7200 RPM
HDD size3.5"3.5"
InterfaceDiffersUltra-ATA/100Serial ATA
TypeHDDHDD
HDD number of cylindersKnown for one16383
HDD number of headsKnown for one16
Read seek timeKnown for one9.9 ms
Write seek timeKnown for one10.9 ms
Average latencyDiffers5.55 ms4.16 ms
Bytes per sectorKnown for one512
Start/stop cyclesKnown for one50000
Mean time between failures (MTBF)Known for one500000 h
Storage drive buffer sizeKnown for one16 MB
Poweridentical
Power consumption (idle)Known for one4.8 W
Power consumption (read)Known for one7.1 W
Power consumption (write)Known for one7.1 W
Operating voltage5 / 12 V5 / 12 V
Start-up currentKnown for one1.4 A
Operational conditions3 differ
Operating temperature (T-T)0 - 60 °C0 - 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-198 - 304 m-60.96 - 3048 m
Non-operating altitudeDiffers-198 - 12192 m-60.96 - 12192 m
Operating shock63 G63 G
Non-operating shockDiffers350 G300 G
Weight & dimensions1 differ
Width101.8 mm101.8 mm
Depth147 mm147 mm
Height26.1 mm26.1 mm
WeightDiffers590 g635 g
Other featuresidentical
Drive devices burst data transfer rate (DMA)Known for one2
Drive devices burst data transfer rate (PIO)Known for one4
Drive devices burst data transfer rate (Ultra DMA)Known for one5
Mac compatibilityKnown for oneNo
Windows operating systems supportedKnown for oneYes
Linux operating systems supportedKnown for oneYes
Acoustic pressure emissionsKnown for one28 dB

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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