author:skate

time:2012/06/05

linux磁盘容量变为64Z

[root@localhost ~]# df -h
文件系统              容量  已用 可用 已用% 挂载点
/dev/sda3             255G  2.6G  240G   2% /
/dev/sda1              99M   18M   77M  19% /boot
tmpfs                  16G     0   16G   0% /dev/shm
/dev/sdb1              64Z   64Z   91G 100% /search
[root@localhost ~]# ll /search/
总计 0
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# ll /search/
总计 0
[root@localhost ~]# df -hT /search/
文件系统      类型    容量  已用 可用 已用% 挂载点
/dev/sdb1     ext3     64Z   64Z   91G 100% /search

[root@localhost ~]# ll /dev/sdb1
brw-r----- 1 root disk 8, 17 06-04 18:38 /dev/sdb1

卸载文件系统

[root@localhost ~]# umount /search

[root@localhost ~]# df -h
文件系统              容量  已用 可用 已用% 挂载点
/dev/sda3             255G  2.6G  240G   2% /
/dev/sda1              99M   18M   77M  19% /boot
tmpfs                  16G     0   16G   0% /dev/shm

[root@localhost ~]# mount -t ext3 /dev/sdb1 /search
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

说明superblock已经损坏，如果没有重要数据可以重建，如下：

[root@localhost ~]# mkfs.ext3 /dev/sdb1
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
12140544 inodes, 24280231 blocks
1214011 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
741 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624, 11239424, 20480000, 23887872

Writing inode tables: done                           
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 39 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

重新mount文件系统

[root@localhost ~]# mount -t ext3 /dev/sdb1 /search
[root@localhost ~]# df -h
文件系统              容量  已用 可用 已用% 挂载点
/dev/sda3             255G  2.6G  240G   2% /
/dev/sda1              99M   18M   77M  19% /boot
tmpfs                  16G     0   16G   0% /dev/shm
/dev/sdb1              92G  188M   87G   1% /search
[root@localhost ~]#

ok

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