Hi Simon, On 06/20/2011 02:16 PM, Simon McNair wrote: > Hi Roman, > Sorry for the stupid omission, I did try running umount /media/local/Raid to no avail. The other thing I also tried was the lazy dismount option, but it never unmounted, I did a force, then remount and dismount, but it didn't make any difference to the errors. none of the processes have a working directory in the Raid folder as it is just for storage, the OS and apps are on a separate drive entirely. I also ensured that my ssh session was not in the /media/local folder either. > > I am pretty sure that I actually want the array running in order to run a mkfs against it (obviously) I just tried that as a last ditch attempt. I'm really just trying to figure out how I can find out what process has the folder locked if lsof and fuser can't tell me :-) You have to consider that the kernel itself may be holding it open. The most common cause in my experience is a loop mounted file, or stacked userspace filesystem. What does lsdrv[1] say? If a loop device is active, run "losetup -a". Phil [1] http://github.com/pturmel/lsdrv -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html