in General Discussion edited January 2014
what does UltraDMA mean? Is that the same as ATA 100? Can it be used in a iMac G3 Classic 600Mhz comp? Never had much experience in the Hard drive field.


  • Reply 1 of 1
    eugeneeugene Posts: 8,254member
    I think ATA represents the interface while DMA and PIO are communications protocols that devices use via the ATA interface.

    Even then there's ATA 1-6 and UltraDMA Mode 1-5

    You can use any modern UltraDMA ATA HDD advertised under 137 GB with your iMac. Your iMac's ATA controller cannot use larger capacity HDDs, but that should be the only real limitation you'll run into.
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