A.1. Restoring the VG UUIDs using uuid_fixer

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
                

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