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    SubjectRe: the " 'official' point of view" expressed by kernelnewbies.org regarding reiser4 inclusion
    Edward Shishkin wrote:

    > Matthias Andree wrote:
    >
    >> On Tue, 01 Aug 2006, Hans Reiser wrote:
    >>
    >>
    >>> You will want to try our compression plugin, it has an ecc for every
    >>> 64k....
    >>
    >>
    >>
    >> What kind of forward error correction would that be,
    >
    >
    >
    > Actually we use checksums, not ECC. If checksum is wrong, then run
    > fsck - it will remove the whole disk cluster, that represent 64K of
    > data.

    How about we switch to ecc, which would help with bit rot not sector loss?

    >
    >
    > and how much and
    >
    >> what failure patterns can it correct? URL suffices.
    >>
    >
    > Checksum is checked before unsafe decompression (when trying to
    > decompress incorrect data can lead to fatal things). It can be
    > broken because of many reasons. The main one is tree corruption
    > (for example, when disk cluster became incomplete - ECC can not
    > help here). Perhaps such checksumming is also useful for other
    > things, I didnt classify the patterns..
    >
    > Edward.
    >
    >

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