Linux中LVM磁盘更换操作不当导致的错误和修复过程记录.docx

Linux中LVM磁盘更换操作不当导致的错误及修复过程记录今天备份服务器（8.77）在替换磁盘时，新磁盘的加入和应用路径更改都很正常，但在将原磁盘从vg中删除时，由于操作失误，导致vg无法认出，以下是问题过程和解决方法：?在执行pvremove -ff /dev/sdg命令后，vg出现异常，无论vgdisplay、lvdisplay还是pvdisplay，都出现如下提示[root@backupserver data]# vgdisplayCouldnt find device with uuid q2aKwA-0pim-QRr3-4DjN-gZg9-RNk1-eHKMvZ.Couldnt find all physical volumes for volume group stuvg.Couldnt find device with uuid q2aKwA-0pim-QRr3-4DjN-gZg9-RNk1-eHKMvZ.Couldnt find all physical volumes for volume group stuvg.Couldnt find device with uuid q2aKwA-0pim-QRr3-4DjN-gZg9-RNk1-eHKMvZ.Couldnt find all physical volumes for volume group stuvg.Couldnt find device with uuid q2aKwA-0pim-QRr3-4DjN-gZg9-RNk1-eHKMvZ.Couldnt find all physical volumes for volume group stuvg.Couldnt find device with uuid q2aKwA-0pim-QRr3-4DjN-gZg9-RNk1-eHKMvZ.Couldnt find all physical volumes for volume group stuvg.Couldnt find device with uuid q2aKwA-0pim-QRr3-4DjN-gZg9-RNk1-eHKMvZ.Couldnt find all physical volumes for volume group stuvg.Couldnt find device with uuid q2aKwA-0pim-QRr3-4DjN-gZg9-RNk1-eHKMvZ.Couldnt find all physical volumes for volume group stuvg.Couldnt find device with uuid q2aKwA-0pim-QRr3-4DjN-gZg9-RNk1-eHKMvZ.Couldnt find all physical volumes for volume group stuvg. Volume group stuvg not found说明这个pv的信息还存在vg中，但这是pv没有了，vg信息不完整，仔细分析lvm的工作原理，又在网上查找资料后，操作如下：[root@backupserver archive]# vgdisplay --partial -vvv #查看vg中的详细信息如果此信息中其他pv和lv的信息完整，则继续操作Partial mode. Incomplete volume groups will be activated read-only. Processing: vgdisplay --partial -vvv O_DIRECT will be used Setting global/locking_type to 1 File-based locking selected. Setting global/locking_dir to /var/lock/lvm Finding all volume groups /dev/ramdisk: Not using O_DIRECT Opened /dev/ramdisk RO /dev/ramdisk: block size is 1024 bytes /dev/ramdisk: No label detected Closed /dev/ramdisk Opened /dev/root RO O_DIRECT /dev/root: block size is 4096 bytes /dev/root: No label detected