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    SubjectRe: ATA 4 KiB sector issues.
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    >>>>> "hpa" == H Peter Anvin <hpa@zytor.com> writes:

    hpa> On the flipside, though, there really is very little net benefit to
    hpa> 4K as opposed to 512 byte logical sectors: the additional protocol
    hpa> overhead is relatively minimal, and as long as writes are aligned
    hpa> full blocks, there shouldn't be any additional overhead on either
    hpa> the OS or the drive side. On the plus side, you get full
    hpa> compatibility with the existing software stack. The equation
    hpa> really seems rather simple.

    4KB sectors are not a win for anybody except the drive vendors.

    There is a push in the industry right now to keep the 512-byte logical
    blocks forever. The first step would be to report misaligned accesses
    or accesses that are not a multiple of the physical block size. Second
    step would be to eventually reject any write that's not a properly
    aligned multiple of the physical block size.

    --
    Martin K. Petersen Oracle Linux Engineering


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