Somebody in the thread at some point said: > I have a 2 GB Sandisk SD card that I often write to. Just today, it > has started to be mounted read-only: > cp: cannot create regular file `bg.jpg2': Read-only file system Have a look in dmesg to see if the ro filesystem is the reaction to IO errors. > So I tried unmounting it, but the device seems to be busy: > [root@localhost ~]# umount /media/disk > umount: /media/disk: device is busy > umount: /media/disk: device is busy lsof -n | grep media/disk should give a clue about the process that holds an open handle to something on the device. -Andy
