我们在服务器中发生磁盘故障，并在从LVM中取出驱动器之前进行了更换。
服务器有4个物理驱动器（PV），每个都有自己的卷组（VG）。 每个VG有2个或更多逻辑卷（LV）。现在LVM抱怨缺less驱动器。 所以我们有一个VG（vg04），两个LV成了孤儿，比我们需要清除系统。
问题是我们每次运行任何LVM命令时都会遇到这些“读取失败”错误：
# lvscan /dev/vg04/swap: read failed after 0 of 4096 at 4294901760: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 4294959104: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 0: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 4096: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 995903864832: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 995903922176: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 0: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 4096: Input/output error # vgreduce vg04 --removemissing --force /dev/vg04/swap: read failed after 0 of 4096 at 4294901760: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 4294959104: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 0: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 4096: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 995903864832: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 995903922176: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 0: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 4096: Input/output error Volume group "vg04" not found # vgchange -an /dev/vg04 /dev/vg04/swap: read failed after 0 of 4096 at 4294901760: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 4294959104: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 0: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 4096: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 995903864832: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 995903922176: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 0: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 4096: Input/output error Volume group "vg04" not found # lvchange -an /dev/vg04/vz /dev/vg04/swap: read failed after 0 of 4096 at 4294901760: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 4294959104: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 0: Input/output error /dev/vg04/swap: read failed after 0 of 4096 at 4096: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 995903864832: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 995903922176: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 0: Input/output error /dev/vg04/vz: read failed after 0 of 4096 at 4096: Input/output error Volume group "vg04" not found Skipping volume group vg04 缺less的VG和LV并不重要，我们只是想删除它们。
正如你所看到的，我们已经尝试了所有的build议，到目前为止没有运气。
可以在http://pastebin.com/MHiBzrLJ查看'lvm dumpconfig'的输出
解决scheme是运行dmsetup，在这种情况下是两个命令
dmsetup remove vg04-vz dmsetup remove vg04-swap
在做这个之前，我用命令“dmsetup info”检查了两个LV的“打开计数”是零。
警告： dmsetup可能会破坏您的磁盘严重破坏，以便任何人在将来使用这些信息，请确保您阅读手册页。
删除VMware磁盘/dev/sdb后，我经历了类似的情况。
使用lsscsi来确定正在使用哪个设备（您可能需要安装该程序），然后运行lsscsi ：
# lsscsi [1:0:0:0] cd/dvd NECVMWar VMware IDE CDR10 1.00 /dev/sr0 [2:0:0:0] disk VMware Virtual disk 1.0 /dev/sda [2:0:1:0] disk VMware Virtual disk 1.0 /dev/sdb <== the removed physical disk [2:0:2:0] disk VMware Virtual disk 1.0 /dev/sdc
现在写入删除文件
# echo 1 > /sys/class/scsi_device/2\:0\:1\:0/device/delete
该设备立即消失。
vgchange -an / dev / vg04
如果您的逻辑卷仍处于活动状态，则可能必须执
lvchange -an /dev/vg04/swap lvchange -an dev/vg04/vz
等等