Re: Dump failure
From: Logan Shaw (lshaw-usenet_at_austin.rr.com)
Date: 12/31/04
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Date: Fri, 31 Dec 2004 03:31:52 GMT
Simon wrote:
> I'm attempting to dump my entire /usr filesystem to a mounted disk, but it
> keeps failing - apparently at the same point. The filesystem is big - 21GB
> - but the mounted disk has plenty of capacity for the task. Here's how it
> goes :
>
> dump -0uan -L -f /mnt/<backupname> /usr
>
> DUMP: Date of this level 0 dump: Thu Dec 30 13:52:42 2004
> DUMP: Date of last level 0 dump: the epoch
> DUMP: Dumping snapshot of /dev/ad0s1f (/usr) to /mnt/usr301204
> DUMP: mapping (Pass I) [regular files]
> DUMP: mapping (Pass II) [directories]
> DUMP: estimated 21741832 tape blocks.
> DUMP: dumping (Pass III) [directories]
> DUMP: dumping (Pass IV) [regular files]
> DUMP: 2.36% done, finished in 3:26
> DUMP: 5.78% done, finished in 2:43
> DUMP: 9.91% done, finished in 2:16
> DUMP: 14.80% done, finished in 1:55
> DUMP: write error 4194340 blocks into volume 1
>
> Broadcast Message from root
> (/dev/ttyp0) at 14:17 GMT...
>
> Message from the dump program to all operators
>
> DUMP: NEEDS ATTENTION: write error 4194340 blocks into volume 1
> DUMP WRITE ERROR!
>
>
> Other filesystems (much smaller) backed-up just fine using the same syntax.
You could try using "-f /dev/null". That should give you a good idea
whether the problem is on the dumping or on the writing-to-a-file side.
Also, can you create a file greater than 2 GB on the destination
filesystem? Have you tried doing something like
dd if=/dev/zero bs=1024k count=5000 of=/mnt/bigfile
to see that at least "dd" can write a big file to the filesystem?
I don't know much about large file (> 2 GB) support on FreeBSD,
but is it possible your installation is too old to support large
files?
- Logan
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