Re: end to end error recovery musings

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> Not sure you're up-to-date on the T10 data integrity feature.
> Essentially it's an extension of the 520 byte sectors common in disk

I saw the basics but not the detail. Thanks for the explanation it was
most helpful and promises to fix a few things for some controllers.. but
here's a minor bit of passing bad news - quite a few older ATA controllers
can't issue DMA transfers that are not a multiple of 512 bytes without
crapping themselves (eg READ_LONG). Guess we may need to add
ap->i_do_not_suck or similar 8)

On the bright side I believe the Intel ICH is the only one with this
problem (and a workaround) which is SATA capable 8)

Alan
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