Jeff Breidenbach schrieb:
Ok... thanks everyone!
Something from me:
What you should be able to do with software raid1 is the following:
Stop the raid, mount both underlying devices instead of the raid device,
but of course READ ONLY. Both contain the complete data and filesystem,
and in addition to that the md superblock at the end. Both should be
identical copies of that.
Thus, you do not have to resync afterwards. You then can backup the one
disk while serving the web server from the other. When you are done,
unmount, assemble the raid, mount it and go on.
Eg. /dev/md1 consists of /dev/hda5 and /dev/hdc5 and has a working fs on it.
/dev/md1 is mounted on /data.
umount /dev/md1
mdadm -S /dev/md1
mount -r /dev/hda5 /data
mount -r /dev/hdc5 /backup
do your backup
umount /dev/hda5
umount /dev/hdc5
mdadm -A /dev/md1
mount /dev/md1 /data
Please could somebody double-check or confirm this first?
Hope this helps, Norman.
--
Norman Schmidt Institut fuer Physikal. u. Theoret. Chemie
Dipl.-Chem. Univ. Friedrich-Alexander-Universitaet
schmidt@xxxxxxx Erlangen-Nuernberg
+49 9131 852 7321 IT-Systembetreuer Physikalische Chemie
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