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I reloaded my PC onto a new disk then put the old disk back in the PC to recover old files. I kept the same PC name. The OS setup routine appears to have used my PC name (stiffler) to create the LVM names.

[root@stiffler ~]# pvs
  PV         VG          Fmt  Attr PSize   PFree
  /dev/sda2  vg_stiffler lvm2 a-   232.31g    0 
  /dev/sdb2  vg_stiffler lvm2 a-   232.63g    0 

So the volume group name on both of my disks has the same name! I'm booted to the correct one, but I would like to access the second one. How do I rename the other one so I can gain access to it by a unique name?

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up vote 3 down vote accepted

disconnect one of the disks and use vgrename

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Yup. Worked - thanks! I had some problems in the past with an LVM situation where vgrename wouldn't work so I guess I discounted the command prematurely. As a side note, I booted to Fedora 14 LIVE and performed the vgrename that way. – regulatre Nov 22 '10 at 17:46
yeah, the previously not working was probably due to not letting you rename VGs in use – RobotHumans Nov 22 '10 at 17:50

If you don't want to (or can) disconnect one of the drives, you can list the volume UUID instead of the old name.

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Do you mean "can't". Also, should this be a comment rather than an answer? – vgoff Nov 12 '12 at 0:45
No it should be a comment. It's a totally different solution. – d-_-b Jun 18 '13 at 14:06

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