Hello, I have two large devices /dev/sdc and /dev/sdd, which both have lvm. Yesterday the OS was reinstalled and /etc/lvm was overwritten (there is no backup). It also looks like anaconda placed a new disk label on the two devices. Fortunately, I was able to reconstruct a backup of the lvm metadata for /dev/sdd, but am not sure how to do this for /dev/sdc. I believe I know what the metadata for /dev/sdc is, but I don't know what any of the uuids are. My basic question is whether I can possibly create new uuids without totally hosing the system. Let me explain what I did for /dev/sdd and what I am considering to /dev/sdc: 1. Created a new file containing the metadata for the volume group called jetstor1 on /dev/sdd and put it in /etc/lvm/backup. I was able to find this information on the disk using: strings /dev/sdd 2. Removed the disk label on /dev/sdd using: dd if=/dev/zero of=/dev/sdd bs=1k count=1 3. Used pvcreate to restore the metadata: pvcreate -u <snip: the pv uuid I recovered> /dev/sdd 4. Restored the volume description using: vgcfgrestore -f jetstor1 jetstor1 5. Made the volume activate using: vgchange -ay This process worked just fine for /dev/sdd, but 'strings /dev/sdc' doesn't contain any backup of the metadata for some reason. I believe I know what all the information should be except for the uuids. So my question is can I just make up new uuids and if so how. I have attached what I believe the backup should be with the exception of not knowing the uuids. Thanks, -- Jarrod Millman Computational Infrastructure for Research Labs 10 Giannini Hall, UC Berkeley phone: 510.643.4014 http://cirl.berkeley.edu/
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