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    SubjectRe: 2GB MMC/SD cards
    FromRichard Purdie <>
    DateTue, 06 Jun 2006 08:17:00 +0100
    On Mon, 2006-06-05 at 16:29 -0600, Jordan Crouse wrote:
    > I'm not 100% sure what the community stance is on using the simplified specs.
    > I do believe the answer lies definitively within, but I'll refrain from
    > quoting it to avoid any legal complaints.  For the longest time, my gut
    > feeling has been that 512 byte writes were always accepted - but since all of
    > our 2G and 4G cards support WRITE_BL_PARTIAL, we haven't had a chance to 
    > prove the argument one way or the other.
    > 
    > We first heard about very large card issues from one of our customers, and
    > we haven't heard any more problems since we gave them a patch to force the
    > sector size on all SD/MMC cards to 512 bytes.  Thats just anecdotal evidence,
    > but it is food for thought.
    
    For what its worth this is the feeling I get from the users of the
    Zaurus kernels as well. For the PXA driver, there is the added
    complication that it doesn't support block sizes > 1023 but I've had no
    complaints since I limited it to 512.
    Richard
    
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