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Thread: Is ATA 133 backwards compatible with ATA 100




  1. #1
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    Dec 2001
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    Is ATA 133 backwards compatible with ATA 100?
    There are 10 ppl in this world...
    those who understand binary, and those who dont

  2. #2
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    I haven't tried one yet, but yes... it is supposed to be backwards compatible.
    Old age and treachery will overcome youth and skill
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  3. #3
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    AFAIK the ATA/133 drives should be fine on an ATA/100 controller :)
    What came first - Insanity or Society?

  4. #4
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    Feb 2002
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    Yes, Just like ATA33/ATA66/ATA100 its all backward compatible

  5. #5
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    Feb 2002
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    ATA 133 is not yet an industry standard. (owned by Maxtor)
    However, it was designed to be full backward compatible.
    The higher transfer rate of 133 MB/sec is achieved by shortening the cycle time from 40 ns (ATA 100) to 30 ns (ATA 133).
    A couple good reads


    http://www.maxtor.com/products/fastdrive/whitepaper.htm

    Raid/133

  6. #6

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    There are some fairly large architectural changes in the ATA-133 format. The major ones I can see is the 48-bit address bus and and the 137GB limit on the other ATA formats. If you have one of Maxtors new 160GB HDD's, how is a ATA-100 controller giong to see it all if it's address bus limits it to 137GB? Me thinks I may have to do some reading on this!

  7. #7
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    Partitioning. :smokin:
    :cheers:

  8. #8

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    Quote Originally Posted by Wiggo
    Partitioning. :smokin:
    :cheers:
    Partitioning won't do it because the 137GB limit is the physical limit of what the controller on pre ATA-133 can address. You can only partition a drive if the controller can address it!

  9. #9
    Join Date
    Feb 2002
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    Maybe there is some Ontrack type software to get around the 137Gb limit, like with computers that have an 8Gb limit

  10. #10

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    If they're claiming ATA-100 backwards compatability, I'd say they've got some trick like that up their sleeve. As T-Shirt posted, there are some good links regarding ATA-133 off the Maxtor site.

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