Re: fs switching to read-only

["Nikita V. Youshchenko" <yoush@cs.msu.su>]

> Hola~
> 
> After a nasty system hang, I power cycled the machine, fsck ran and found
> enough errors to bootup readonly. I ran fsck by hand, which found some
> more problems, but nothing that seemed all that out of the ordinary. I
> rebooted again and all seemed well with the world.
> 
> Now, if I try to access or remove certain files on the disk the access
> will fail and the fs will switch to read-only. There's nothing strange in
> the syslog.
> 
> Anyone ever seen something like this?

See man mount, mount options for ext2, option 'errors'
Seems that your fs is mounted with errors=remount-ro, and some errors do 
happen.
Booting with init=/bin/bash and run fsck -c /dev/<your-device>.
This may help.