12.1. Restoring the VG UUIDs using uuid_editor

If you've upgraded LVM from previous versions to early 0.9 and 0.9.1 versions of LVM and vgscan says vgscan -- no volume groups found , this is one way to fix it.

• Download the UUID fixer program from the contributor directory at Sistina.

  It is located at ftp://ftp.sistina.com/pub/LVM/contrib/uuid_fixer-0.3-IOP10.tar.gz"

• Extract uuid_fixer-0.3-IOP10.tar.gz

  # tar zxf uuid_fixer-0.3-IOP10.tar.gz

• cd to uuid_fixer

  # cd uuid_fixer

  You have one of two options at this point:

  1. Use the prebuild binary (it is build for i386 architecture).

     Make sure you list all the PVs in the VG you are restoring, and follow the prompts

     # ./uuid_fixer <LIST OF ALL PVS IN VG TO BE RESTORED>

  2. Build the uuid_builder program from source

     Edit the Makefile with your favorite editor, and make sure LVMDIR points to your LVM source.

     Then run make.

     # make

     Now run uuid_fixer. Make sure you list all the PVs in the VG you are restoring, and follow the prompts.

     # ./uuid_fixer <LIST OF ALL PVS IN VG TO BE RESTORED>

• Deactivate any active Volume Groups ( optional )

  # vgchange -an

• Run vgscan

  # vgscan

• Reactivate Volume Groups

  # vgchange -ay