Linux下，解决LVM分区中unknown device的bug

LVM分区中查看PV时，出现如下错误：

# pvscan
Couldn't find device with uuid .........
PV   /dev/sda2                  VG  VolGroup00    lvm2 [17.99GB/0  free]
PV   unknown device        VG  VolGroup00    lvm2[2.21GB/2.21GB]

解决方法：从VG中去除PV unknown device
采用 vgreduce –removemissing /dev/VolGroup00 命令去除未知或已丢失的VG

从VG中去除特定的PV:

vgreduce VolGroup00 /dev/sdb1

删除PV:

vremove /dev/sdb1