[sclug] Well, *that's* not supposed to happen...

Benjamin Johnson bafjohnson at gmail.com
Thu May 24 15:56:41 UTC 2007


presumably the powered USB hub you mention is also connected to the
mains by means of the UPS?



On 24/05/07, Will Dickson <wrd at glaurung.demon.co.uk> wrote:
> Hi all,
> I've got a USB2.0 external HDD which I use for backups. It came with
> FAT32, but I got bored with the 4GB file limit (and the various
> irritations which arise 'cos it has to emulate file ownerships /
> permissions) so I stuck ext3 on it instead.
> Then there was a power cut. Now, this shouldn't have made any difference
> - it was plugged in at the time, but the box in question has a UPS
> (which worked), I'm pretty certain it wasn't mounted (the backup system
> automatically unmounts it when it's finished) and I managed to do a
> clean shutdown before the UPS ran out of battery.
> Anyway, everything came back up nicely and I thought no more about it,
> until this morning when I turned on the monitor of the box in question
> for another reason (it's a server) and saw a load of error messages from
> EXT3FS all over the console. WTF? Ran e2fsck, loads of filesystem errors
> :-( It lost one largish file completely (fortunately, nothing I cared
> about that much, and the original is OK anyway) and the datestamps on
> the various files it's supposed to back up every night are 20 / 21 may
> (some 20, some 21); this was the day the power cut hit, which is why I
> mention it.
> Badblocks -n is still running, but nothing so far. Hardware is a fairly
> elderly Athlon with a powered hub, running KUbuntu Dapper, fully updated.
> Anyone have any ideas why this might have happened? AIUI ext3 is
> supposed to be ultra-reliable, which is why I went for it. All I know
> is, I never had anything like this from FAT32 :-/
> Will.

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