Hello list, I just changed to the backup media hard disk. Two identical discs with one partition do the job. That works so far but every time I change the disk (its a hotplug hard disk) the system fails to mount or check the filesystem. It seems that somehow the system sees another disk id and then just doesn't doesn't want to mount anymore. So far I could solve the problem with writing the partition table again of the new disk with fdisk as rebooting is not an option. Seems that this triggers to set the device (/dev/sdc1 in my case) correctly again. As the backup script should run without any interaction this is far from a solution. How can I force that the device is set correctly again after a hard disk change. I am not very familiar with the whole hotplug system of linux so any hint would be really appreciated. Thanks Ulf