LVM unknown device how to recover?

2018-03-15 14:36:05 +0800

I have a server with two hard drives that I thought I had correctly installed with LVM, until I discovered that the second hard-drive did not actually seem to be used. I investigated the problem and followed some instructions found online, but the problem got worse. Apparently, my initial mistake was to remove the physical volume with pvremove when I should have used mvreduce.

LV扩容

过程如下：

挂载一块硬盘4T


fdisk /dev/sdb

send n

send p

send w;

mkfs -t ext4 -c /dev/sdb1

wrating....


pvcreate /dev/sdb1


vgextend rhel /dev/sdb1


lvextend -L +2000G  /dev/mapper/lvs-home

#根据文件格式进行重置home大小

xfs_growfs /dev/mapper/lvs-home

    or

resize2fs -p /dev/mapper/lvs-home

其中遇到的问题如下：

创建完成PV-->mkfs(格盘)-->vgs(warning Device with uuid XXXXXX-xxxxxx-xxx-xxxx-xxxxx)

解决办法：
pvcreate --uuid "UUID" --restorefile /etc/lvm/archie/rhel_000001-1511980835.vg  /dev/sdb1 -ff

如果解决不了用第二种方式：
vgreduce --removemissing --verbose myVG_NAME

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