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Prior to upgrading some of my hardware I had 4 drives used just as storage. Now I'm trying to mount the drives as an LVM but I don't have enough slots to connect all the drives at once now b/c they use an outdated type of cable. I can connect three of the four. So, can I somehow move these to a new group, or remove the missing drive from the existing group?

The error is:

Couldn't read all logical volumes for volume group VolGroup. Couldn't find device with uuid 'yQtrVB-5jCk-vF10-05c2-AcDL-GNn1-ivdxxh'.

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up vote 1 down vote accepted

I think you want the '-P', or '--partial' option. From the lvm manpage:

       -P | --partial
              When set, the tools will do their best to provide access to vol‐
              ume groups that are only partially available.
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Awesome! OK, But when I do 'lvs' after that is only shows a boot and swap partition in the volumes. I'm expecting something like 'LogVol00'. Ideas? – 99miles Mar 6 '10 at 2:15
It still needs to have access to the disks which make up the LV's in order to access them. If you have any LV's which span all 4 PV's, then you're still not going to be able to access them. – gorilla Mar 6 '10 at 11:01
THey were not in a raid or anything -- they were their own inddividual drives with individual data. – 99miles Mar 6 '10 at 16:28
Yes, but a LV can be on more than one PV. If you have 2 500Gb drives, and 3 300Gb filesystems, you might have 300Gb on drive 1 for FS1, 200 on drive 1 for FS2, 100 on drive 2 for FS2, and 300 on drive 2 for FS3. Then FS1 will be accessible if you have drive 1 connected, FS3 if you have drive 2 connected, but FS2 needs to have both drives connected, because the data is on both drives. I don't have multiple PV's on my system here, but I belive that "pvdisplay -m" will tell which devices each lv is on, and you can then deduce which drives need to be installed to access that filesystem. – gorilla Mar 6 '10 at 22:13

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