ATA 66/100/133 are all interchangeable??

Discussion in 'PowerPC Macs' started by Patth9, Feb 27, 2015.

  1. Patth9 macrumors regular


    Jun 28, 2007
    Having read the information below, does it make a difference which bay, left or right, is used for a system hard drive? I don’t know what is meant by ATA 66/100/133 are all interchangeable.

    Can officially support four internal hard drives -- two Ultra ATA/100 (ATA-6) and two Ultra ATA/66 (ATA-5) -- drives larger than 128 GB are supported. By default, a single Ultra ATA/100 drive is installed.
    Apple Power Macintosh G4 867 DP (MDD)M8787LL/A Apple Model No:M8570

    Somewhere, in the recesses of my mind, I remember a difference, but it may be with the G3.

  2. bunnspecial macrumors 603


    May 3, 2014
    As best as I know, all are pretty much backward and forward compatible.

    I've yet to find a consumer-grade platter IDE drive that can even come close to saturating an ATA66 bus.
  3. poiihy macrumors 68020


    Aug 22, 2014
    The number means the max speed in Megabyte/s right? So ATA66 is max 66Mbyte/s? Not much better than FireWire 400...
  4. Patth9 thread starter macrumors regular


    Jun 28, 2007
    I'm using Sata HD, rather than IDE does that matter?
  5. Anonymous Freak macrumors 601

    Anonymous Freak

    Dec 12, 2002
    The last generation of PATA drives came close (Seagate Barracuda 7200.10 750 GB was available in both PATA and SATA, and tests at 64 MB/s for average read speed, not burst.) And of course, modern SATA SSDs on PATA adapters can saturate ATA 133 easily.

    The vast majority of drives are forward and backward compatible. But there are a few drives that require a jumper be set to be backward compatible properly.

Share This Page