old-www/HOWTO/LVM-HOWTO/activatevgs.html

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>11.3. Activating a volume group</H1
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>&#13; After rebooting the system or running
<B
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>vgchange -an</B
>, you will not be able to access
your VGs and LVs. To reactivate the volume group, run:
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># vgchange -a y my_volume_group</B
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