[mythtv-users] Is my JFS broken ?
mythlist at assursys.co.uk
Thu Aug 21 09:25:41 UTC 2008
On Wed, 20 Aug 2008, Graham Wood wrote:
> One last check (that will probably take quite a while) would be to attempt to read the block
> device using dd - that'll tell you if the problem is with jfs or at a lower level. Just "dd
> if=<block device> of=/dev/null bs=16M" and leave it running overnight ;)
That's correct, but read errors occur from time to time on
perfectly-serviceable discs; that's what spare blocks are for! All drives
that I've tested though, only remap failed blocks on a write attempt.
In this case, my money's on a) filesystem corruption by unclean
reboot/shutdown, b) a filesystem bug or c) wonky memory causing temporary or
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