挂载移动硬盘时出现：can't read superblock错误

lmickie

~]#fsck.vfat /dev/sdb6 -a -w
dosfsck 3.0.0, 28 Sep 2008, FAT32, LFN
There are differences between boot sector and its backup.
Differences: (offsetriginal/backup)
  65:01/00
  Not automatically fixing this.
Cluster 119 out of range (21066354 > 5118217). Setting to EOF.
Cluster 125 out of range (173342720 > 5118217). Setting to EOF.
Cluster 254 out of range (23155282 > 5118217). Setting to EOF.
Cluster 375 out of range (21066354 > 5118217). Setting to EOF.
Cluster 381 out of range (173342720 > 5118217). Setting to EOF.
/
  Contains a free cluster (2). Assuming EOF.
FAT32 root dir starts with a bad cluster!


:help

~]# dmesg |tail
sd 3:0:0:0: [sdb] Assuming drive cache: write through
sdb: sdb1 sdb2 < sdb5 sdb6 sdb7 >
sd 3:0:0:0: [sdb] Attached SCSI disk
sd 3:0:0:0: Attached scsi generic sg1 type 0
SELinux: initialized (dev sdb1, type vfat), uses genfs_contexts
SELinux: initialized (dev sdb5, type vfat), uses genfs_contexts
SELinux: initialized (dev sdb7, type vfat), uses genfs_contexts
FAT: Filesystem panic (dev sdb6)
    fat_get_cluster: invalid cluster chain (i_pos 0)
    File system has been set read-only