Hi Who can help analyze the following message . Or give me some advice, I will appreciate it very much. Dec 17 22:14:42 bdsitdb222 kernel: Buffer I/O error on device dm-7, logical block 810449 Dec 17 22:14:42 bdsitdb222 kernel: lost page write due to I/O error on dm-7 Dec 17 22:14:48 bdsitdb222 kernel: Buffer I/O error on device dm-7, logical block 283536 Dec 17 22:14:48 bdsitdb222 kernel: lost page write due to I/O error on dm-7 Dec 17 22:14:48 bdsitdb222 kernel: Buffer I/O error on device dm-7, logical block 283537 Dec 17 22:14:48 bdsitdb222 kernel: lost page write due to I/O error on dm-7 Dec 17 22:14:48 bdsitdb222 kernel: JBD: Detected IO errors while flushing file data on dm-7 Dec 17 22:15:42 bdsitdb222 kernel: Buffer I/O error on device dm-8, logical block 127859 Dec 17 22:15:42 bdsitdb222 kernel: lost page write due to I/O error on dm-8 Dec 17 22:15:42 bdsitdb222 kernel: JBD: Detected IO errors while flushing file data on dm-8 Dec 17 22:15:48 bdsitdb222 kernel: Aborting journal on device dm-7. Dec 17 22:15:48 bdsitdb222 kernel: EXT3-fs (dm-7): error in ext3_new_blocks: Journal has aborted Dec 17 22:15:48 bdsitdb222 kernel: EXT3-fs (dm-7): error in ext3_reserve_inode_write: Journal has aborted Dec 17 22:16:42 bdsitdb222 kernel: Aborting journal on device dm-8. Dec 17 22:16:42 bdsitdb222 kernel: EXT3-fs (dm-7): error: ext3_journal_start_sb: Detected aborted journal Dec 17 22:16:42 bdsitdb222 kernel: EXT3-fs (dm-7): error: remounting filesystem read-only Dec 17 22:16:48 bdsitdb222 kernel: Buffer I/O error on device dm-7, logical block 23527938 Dec 17 22:16:48 bdsitdb222 kernel: lost page write due to I/O error on dm-7 Dec 17 22:16:48 bdsitdb222 kernel: Buffer I/O error on device dm-7, logical block 0 Dec 17 22:16:48 bdsitdb222 kernel: lost page write due to I/O error on dm-7 Dec 17 22:16:48 bdsitdb222 kernel: JBD: I/O error detected when updating journal superblock for dm-7. Dec 17 22:17:05 bdsitdb222 kernel: EXT3-fs (dm-7): error in ext3_orphan_add: Journal has aborted Dec 17 22:17:05 bdsitdb222 kernel: __journal_remove_journal_head: freeing b_committed_data plus info: it's KVM # uname -a Linux bdsitdb222 2.6.32-279.19.1.el6.62.x86_64 #6 SMP Mon Dec 3 22:54:25 CST 2018 x86_64 x86_64 x86_64 GNU/Linux1 # cat /proc/mounts rootfs / rootfs rw 0 0 proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0 sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0 devtmpfs /dev devtmpfs rw,nosuid,relatime,size=8157352k,nr_inodes=2039338,mode=755 0 0 devpts /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=000 0 0 tmpfs /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0 /dev/mapper/systemvg-rootlv / ext4 rw,relatime,barrier=1,data=ordered 0 0 /proc/bus/usb /proc/bus/usb usbfs rw,relatime 0 0 /dev/vda1 /boot ext4 rw,relatime,barrier=1,data=ordered 0 0 /dev/mapper/systemvg-homelv /home ext4 rw,relatime,barrier=1,data=ordered 0 0 /dev/mapper/systemvg-optlv /opt ext3 rw,relatime,errors=continue,barrier=1,data=ordered 0 0 /dev/mapper/systemvg-tmplv /tmp ext3 rw,relatime,errors=continue,barrier=1,data=ordered 0 0 /dev/mapper/systemvg-usrlv /usr ext4 rw,relatime,barrier=1,data=ordered 0 0 /dev/mapper/systemvg-varlv /var ext4 rw,relatime,barrier=1,data=ordered 0 0 /dev/mapper/datavg-datalv /mysql/data ext3 rw,relatime,errors=continue,barrier=1,data=ordered 0 0 /dev/mapper/datavg-binloglv /mysql/binlog ext3 rw,relatime,errors=continue,barrier=1,data=ordered 0 0 none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0 sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0 none /sys/kernel/debug debugfs rw,relatime 0 0 # ll /dev/mapper/ total 0 crw-rw---- 1 root root 10, 58 Dec 19 19:21 control lrwxrwxrwx 1 root root 7 Dec 19 19:21 datavg-binloglv -> ../dm-3 lrwxrwxrwx 1 root root 7 Dec 19 19:21 datavg-datalv -> ../dm-2 lrwxrwxrwx 1 root root 7 Dec 19 19:21 systemvg-homelv -> ../dm-4 lrwxrwxrwx 1 root root 7 Dec 19 19:21 systemvg-optlv -> ../dm-7 lrwxrwxrwx 1 root root 7 Dec 19 19:21 systemvg-rootlv -> ../dm-1 lrwxrwxrwx 1 root root 7 Dec 19 19:21 systemvg-swaplv -> ../dm-0 lrwxrwxrwx 1 root root 7 Dec 19 19:21 systemvg-tmplv -> ../dm-6 lrwxrwxrwx 1 root root 7 Dec 19 19:21 systemvg-usrlv -> ../dm-8 lrwxrwxrwx 1 root root 7 Dec 19 19:21 systemvg-varlv -> ../dm-5
