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


    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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