/dev/sda1 on / type exte3(rw, realtime, errors=remount-ro)
proc on /proc type proc (rw)
none on /sys type sysfs(rw, noexec, nosuid,nodev)
none on /dev type tmpfs (rw, mode=0755)
none on /dev/pts type devpts 9rw, noexec, nosuid, gid=5, mode=0620)

mount warning /etc/mtab is not writable (e.g. read-only fulesystem). it is possible that information reported by mount(8) is not up to date. for actual information about system munt points check the /proc/mounts file.