First, I encountered this error "Can't pvremove physical volume "/dev/sdc1" of volume group "nova-volumes" without -ff" (I'm actually using OpenStack but it's another story).   So to remove this, do first,   ~# pvscan    PV /dev/sdb1   VG nova-volumes    lvm2 [1.82 TiB / 1.82 TiB free]    PV /dev/sda5   VG cloudmaster     lvm2 [297.85 GiB / 12.00 MiB free]    PV /dev/sdc1                      lvm2 [1.82 TiB]    Total: 3 [3.93 TiB] / in use: 2 [2.11 TiB] / in no VG: 1 [1.82 TiB]   Then, when I do,   ~# pvremove /dev/sdc1   Can't pvremove physical volume "/dev/sdc1" of volume group "nova-volumes" without -ff   So I need to,   ~# vgreduce nova-volumes /dev/sdc1    Removed "/dev/sdc1" from volume group "nova-volumes"    Then do `pvscan` again,   ~# pvscan    PV /dev/sdb1   VG nova-volumes    lvm2 [1.82 TiB / 1.82 TiB free]    PV /dev/sda5   VG clou...
 
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