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Product comparison · 2 internal hard drives

Seagate 160GB 3.5" SATA II vs Seagate 40GB 3.5" Ultra ATA/100

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  • 30specifications compared
  • 6differ
  • 24identical
  • 0known for one product only

Key differences

The Seagate 160GB 3.5" SATA II has 120 GB more HDD capacity than the Seagate 40GB 3.5" Ultra ATA/100 (160 GB vs 40 GB). The Seagate 160GB 3.5" SATA II has 6 MB more storage drive buffer size than the Seagate 40GB 3.5" Ultra ATA/100 (8 MB vs 2 MB). The Seagate 40GB 3.5" Ultra ATA/100 has 3 ms more read seek time than the Seagate 160GB 3.5" SATA II (11 ms vs 8 ms). Interface: Serial ATA II on the Seagate 160GB 3.5" SATA II, Ultra-ATA/100 on the Seagate 40GB 3.5" Ultra ATA/100.

  • HDD capacity
    • 160 GB
    • 40 GB
  • Interface
    • Serial ATA II
    • Ultra-ATA/100
  • Storage drive buffer size
    • 8 MB
    • 2 MB
  • Read seek time
    • 8 ms
    • 11 ms
  • Write seek time
    • 9 ms
    • 12 ms
  • Start-up current
    • 2.6 A
    • 2.8 A

Side by side

Differences highlightedShow differences only
30 specifications
A

Seagate

160GB 3.5" SATA IIView product
B

Seagate

40GB 3.5" Ultra ATA/100View product
Features5 differ
HDD capacityDiffers160 GB40 GB
HDD speed7200 RPM7200 RPM
HDD size3.5"3.5"
InterfaceDiffersSerial ATA IIUltra-ATA/100
TypeHDDHDD
Storage drive buffer sizeDiffers8 MB2 MB
HDD number of cylinders1638316383
HDD number of heads1616
Read seek timeDiffers8 ms11 ms
Write seek timeDiffers9 ms12 ms
Average latency4.16 ms4.16 ms
Bytes per sector512512
Start/stop cycles5000050000
Power1 differ
Operating voltage5 / 12 V5 / 12 V
Start-up currentDiffers2.6 A2.8 A
Operational conditionsidentical
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 altitude-60.96 - 3048 m-60.96 - 3048 m
Non-operating altitude-60.96 - 12192 m-60.96 - 12192 m
Operating shock63 G63 G
Non-operating shock350 G350 G
Weight & dimensionsidentical
Width101.6 mm101.6 mm
Depth146.9 mm146.9 mm
Height26 mm26 mm
Weight580 g580 g
Other featuresidentical
Drive devices burst data transfer rate (DMA)22
Drive devices burst data transfer rate (PIO)44
Drive devices burst data transfer rate (Ultra DMA)55

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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