Filesystem error recorded from previous mount IO failure

RHEL5.5

[root@10_32_66_32 ~]# mount

/dev/sda3 on / type ext3 (rw)

proc on /proc type proc (rw)

sysfs on /sys type sysfs (rw)

devpts on /dev/pts type devpts (rw,gid=5,mode=620)

/dev/sda1 on /boot type ext3 (rw)

tmpfs on /dev/shm type tmpfs (rw)

none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

 

mount: warning /etc/mtab is not writable (e.g. read-only filesystem).

It's possible that information reported by mount(8) is not

up to date. For actual information about system mount points

check the /proc/mounts file.

 

[root@10_32_66_32 logs]# vim /var/log/messages

Nov 28 10:31:42 10_32_66_32 kernel: EXT3-fs warning (device sda3): ext3_clear_journal_err: Filesystem error recorded from previous mount: IO failure

 

原因：在root登陆下，对/只读权限

 

解决方法：将机器重启，重启过程中磁盘会重新读取(过程比较慢)，重启好后用mount 查看文件系统是否正常，如果还有问题就用mount -n -o remount,rw / 将/重新挂载一次。

 

附加内容：

如果在重启过程中出现以下现象，输入mount -n -o remount,rw /后重启没有，就安装接下的操作

 

 

开机，进入输入密码，在命令行输入fsck –y  /dev/mapper/VolGroup-lv_root(/dev/mapper/VolGroup-lv_root这个路径为报错路径)

 

等加载完后，reboot重启就可以了(20GB大概5分钟就可以了)