disaster recovery Q's
Gene Heskett
gene.heskett at verizon.net
Thu Nov 12 05:56:18 UTC 2009
On Wednesday 11 November 2009, Aldo Foot wrote:
>On Wed, Nov 11, 2009 at 2:35 PM, Gene Heskett <gene.heskett at verizon.net>
> wrote: <...>
>
>> I just checked, and /etc/fstab is using UUID's, how can that be fixed, or
>> should I just put it back to LABEL's and be done with it. That drive is
>> labeled, but I don't believe its /boot for /boot, so
>
>You can get the UUIDs from the HDDs with blkid. Just type at the CLI. Get
> the number for the correct partition and stick it in the fstab and
>grub.conf if needed.
That seems easy enough provided copy & paste worked, those are awfully long
numbers to have to copy by hand.
>You can always use the OS DVD to go into rescue mode (F5) to fix things.
TBT, that seems a pretty limited way to effect a fix. If the rescue mode
could actually do a one button per partition chroot operation it would be a
huge help. But the last time I used it, I had to reboot to other partitions
& installs just to read the man pages & figure out how to do it without
making a chimera with a moose.
>> how do I get the labels off the drive? Or should I just relabel it to
>> gigo?
>
>See the e2label man page
> # e2label /dev/sdaX --shows current fileystem label
> # e2label /dev/sdaX newLabel -- assigns a new label to the filesystem
I didn't know we even had that command, I had been using tune2fs or gparted.
Thanks.
>> And, if I rsync each directory tree to the new drive, will that move the
>> UUID and/or labels too?
>
>Hmm... where does e2label stores the filesystem label? I don't know.
>I'd guess that dd would copy them, but not rsync. Anyone care to comment?
In any event, I have now constructed a filesystem that is all labels, and
logically formatted and labeled all the empty partitions. I think I am ready
to fire off a long script that should copy everything, but I see in the
rsync manpage that the -H option is expensive one time wise.
Are there any hard links in the system anyplace besides the /etc tree?
>just be cautious and do a bit of your own reading before committing
> changes. ~af
See above, the reading really needs to be available while actually doing
things. It usually isn't. :(
--
Cheers, Gene
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