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Old 01-21-2008, 05:00 AM
 
Default Disk suddenly read-only

Why might a disk suddenly become read-only? I have a 7.04 AMD64 server
with two disks, /dev/sd{a,b}. The trouble is on sda which has
partitions for /var and /boot. I can 'ls' the contents of these, but:

# touch /var/foo
touch: cannot touch `/var/foo': Read-only file system

# touch /boot/foo
touch: cannot touch `/boot/foo': Input/output error

/var/log/syslog ends with

Jan 20 02:50:01 boron /USR/SBIN/CRON[8144]: (root) CMD (if [ -x
/etc/munin/plugins/apt_all ]; then /etc/munin/plugins/apt_all update
7200 12 >/dev/null; elif [ -x /etc/munin/plugins/apt ]; t

except that the final 't' is followed by 80 or so '^@' characters, as
rendered by emacs (the null character?).

What happened? (How) can it be fixed?
--
KM

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