How do you remove a PV from a VG?
Here's what I've tried:
# vgreduce vg_iscsi /dev/sdb1
Physical volume "/dev/sdb1" still in use
# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root centos -wi-ao---- 6.67g
swap centos -wi-ao---- 820.00m
lvm02 vg2 -wi-a----- 800.00m
lv_iscsi_1 vg_iscsi -wi-ao---- 52.00m
Then
# lvremove -f vg_iscsi/lv_iscsi_1
Logical volume vg_iscsi/lv_iscsi_1 in use.
Using fuser
# fuser -kuc /dev/vg_iscsi/lv_iscsi_1
/dev/dm-3: 1558(root)
I tried to kill -9
this but the process seemed to have disappeared by the time I issued the kill
signal.
However, now I get this:
# vgreduce vg_iscsi /dev/sdb1
Can't remove final physical volume "/dev/sdb1" from volume group "vg_iscsi"
Any ideas?
Best Answer
The
vgreduce
command is correct, but you can't remove a physical volume from the volume group until it's empty. That is what the error message that you received means.As the man page states:
Once the PV is empty, you can then repeat the
vgreduce
command to remove it.