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On Friday 18 Sep 2015 19:15:50 Rich Freeman wrote: |
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> On Fri, Sep 18, 2015 at 1:56 PM, Mick <michaelkintzios@×××××.com> wrote: |
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> > On Friday 18 Sep 2015 17:16:54 Marc Joliet wrote: |
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> >> On Friday 18 September 2015 10:31:01 Mick wrote: |
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> >> >A couple of months ago the akonadi DB went sideways and kmail played up |
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> >> >as a result. Again I was suspicious of btrfs, but neither the logs |
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> >> >nor fsck showed up anything. |
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> >> |
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> >> I take it "btrfs scrub" didn't turn up anything, or is that what you |
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> >> meant by fsck? |
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> > |
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> > Am I supposed to run scrub with I do not have a RAID running? I thought |
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> > scrub was meant for comparing checksums between mirrored fs - have I got |
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> > this wrong? |
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> |
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> You can actually run scrub on a non-raid btrfs setup. Btrfs will |
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> report any errors that it detects (using the checksumming in the |
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> filesystem), but it would not be able to fix errors unless you have it |
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> storing redundant data somewhere (even on non-raid it still stores |
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> redundant metadata by default, and you can choose to do this with data |
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> as well which protects against block-level failures but not disk-level |
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> failures, obviously). |
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> |
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> However, you'd have gotten the same errors in dmesg just trying to |
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> read the files - btrfs checks the checksum on all file read |
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> operations. That is a big part of the value of both btrfs and zfs. |
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Ah! V interesting ... can I run scrub with mounted partitions, or do I have |
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to do it from a LiveCD? |
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-- |
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Regards, |
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Mick |
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