linux挂载磁盘就变只读如何解决

Linux系统挂载存储变成只读的解决方案：

1、mount:

用于查看哪个模块输入只读，一般显示为：

[root@localhost ~]# mount

/dev/cciss/c0d0p2 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/cciss/c0d0p7 on /home type ext3 (rw)

/dev/cciss/c0d0p6 on /var type ext3 (rw)

/dev/cciss/c0d0p3 on /usr type ext3 (rw)

/dev/cciss/c0d0p1 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)

/dev/dm-0 on /home/book/upload/BookFile1 type ext3 (rw)

/dev/dm-1 on /home/book/upload/BookFile2 type ext3 (rw)

/dev/dm-2 on /backup type ext3 (rw)

/dev/dm-3 on /home/book/upload/BookFile3 type ext3 (ro)

2、如果发现有ro，就重新mount，或者umount以后再remount

3、umount /dev/dm-3

如果发现有提示“device is busy”，找到是什么进程使得他busy

fuser -m /mnt/data 将会显示使用这个模块的pid

fuser -mk /mnt/data 将会直接kill那个pid

然后重新mount即可。

4、还有一种方法是直接remount，命令为

mount -o rw,remount /mnt/data。

只读的原因在系统日志/var/log/messages里有，一般是因为检测到文件系统有错误

卸载没用umount /maildata试试?

你进单用户模式，手工执行 fsck /dev/sdb1

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