Read Only File System
Ian Chapman
packages at amiga-hardware.com
Wed Oct 10 18:13:49 UTC 2007
tony.chamberlain at lemko.com wrote:
> I heard sometimes if linux encounters errors in a disk it will remount
> it as read only.
Yes that's correct. I believe it's a tuneable option for ext3
filesystems (man tune2fs)
> A mount -l however shows it as
>
> /dev/sdb1 on /home2 type ext3 (rw) []
>
> and ls -ls on it: 4 drwxrwxr-x 9 root cusload 4096 Oct 3 10:19 /home2
> So it appears to be writable.
Unfortunately mount can be misleading in this respect. It shows the
options used to mount the filesystem at mount time, not it's current state.
> Doing antyhing like > /home2/test or vi /home2/test (or any subdirectory)
>
> gives errors though about not being able to write (or read only file
> system).
>
> Any idea what is going on?
You almost certainly have disk errors on this partition, type dmesg or
have a look in /var/log/messages where you'll probably see lots of disk
error output. Take the partition offline if possible and run fsck on it.
--
Ian Chapman.
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