LVM分區在查看PV時提示以下錯誤：
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pvscan
Couldn't find device with uuid MBRrbL-wujm-Tfpe-h2qo-M6vo-9W1B-Im0zjo.
PV /dev/xvda2 VG VolGroup00 lvm2 [7.88 GB / 0 free]
PV /dev/xvda3 VG VolGroup00 lvm2 [1.97 GB / 0 free]
PV unknown device VG VolGroup00 lvm2 [9.97 GB / 9.97 GB free]
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VG中去除PV unknown device：
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vgreduce --removemissing /dev/VolGroup00 #去除未知或已丟失的VG
Couldn't find device with uuid MBRrbL-wujm-Tfpe-h2qo-M6vo-9W1B-Im0zjo.
Wrote out consistent volume group VolGroup00
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從VG中去除特定PV：
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vgreduce VolGroup00
/dev/xvdb1
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刪除PV：
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pvremove
/dev/xvdb1
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https://www.haiyun.me/archives/lvm-vg-reduce-pv.html