现象

[ 2.430354] sd 0：0：0：0： [sda] Assuming drive cache： write through[ 3.852S62] XFS (dm-0)： Metadata corruption detected at xfs_agi_write_verify+8xb5/0>«:0 [xfs]> xfs_agi block 0xl?7f002[ 3.852991] XFS (dm-0): Unmount and run xfs_repair[ 3.853004] XFS (dm-0)： First 64 bytes of corrupted metadata buffer：[ 3.053019] ffff9bef?5d3a6的：58 41 4? 49 00 00 00 01 00 00 00 01 00 2e fe 00 XAGI........................[ 3.053039] ffff9bef?5d3a610: 00 00 48 00 00 01 3d 16 00 00 00 02 00 00 00 8d ........[ 3.0530591 ffff9bef?5d3a620： 00 0a 5b 40 ff ff ff ff ff ff ff ff ff ff ff ff ••[(?......................[ 3.053079] ffff9bef75d3a630： ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ....................[ 3.853102] XFS (dm-0)： Corruption of in-memory data detected. Shutting down filesystem[ 3.853121] XFS (dm-0)： Please umount the filesystem and rectify the problem(s)[ 3•0M521] systemd-fstab-generator[444]: Failed to open /sysroot/etc/fstab: Input/output errorGenerating "/run/in itramfs/rdsosreport.txt"Entering emergency mode. Exit the shell to continue.Type "journaletl” to view system logs.You might want to save "/run/initramfs/rdsosreport.txt" to a USB stick or /bootafter mounting them and attach it to a bug report.

解决办法：

#xfs_repair /dev/dm-0

如果报错：xfs_repair： cannot open /dev/dm-0: Device or resource busy

则

#umount /dev/mapper/centos-root#xfs_repair -v -L /dev/mapper/centos-root#reboot