ext3是linux下较老的文件系统格式，但目前仍有少部分用户在使用ext3作为linux文件系统格式。

linux下ext3文件系统突然变成readonly 问题线索

#tail  -100  /var/log/messages

 Sep  1 04:02:21 www syslogd 1.4.1: restart.
 Sep  1 11:22:16 www avahi-daemon[2691]: Invalid query packet.
 Sep  1 11:22:57 www last message repeated 14 times
 Sep  1 11:22:57 www avahi-daemon[2691]: Invalid query packet.
 Sep  1 13:45:29 www kernel: ext3_abort called.
 Sep  1 13:45:29 www kernel: EXT3-fs error (device hdb1): ext3_put_super: Couldn't clean up the journal
 Sep  1 13:46:31 www kernel: kjournald starting.  Commit interval 5 seconds
 Sep  1 13:46:31 www kernel: EXT3 FS on hdb1, internal journal
 Sep  1 13:46:31 www kernel: EXT3-fs: mounted filesystem with ordered data mode.
 Sep  1 13:48:25 www kernel: printk: 5 messages suppressed.