Hello! ...and then c.buhtz@xxxxxxxxx said... % ... % /dev/sdc (as discs without partitions) are configured as RAID1 This is fine, although it makes me queasy; I always create a partition table and use a partition as a RAID device, and I leave a sliver at the back end to hold useful information when the array is completely toasted. But that's just me :-) % /dev/md127 and formated with ext4 and mounted to /Daten. I can read % and write without any problems to the RAID. On the other hand, this part is interesting ... % ... % % Here is the output of my fdisk -l. Interesting here is that % /dv/md127 is shown but without its filesysxtem. % ... % >Disk /dev/md127: 8 GiB, 8580497408 bytes, 16758784 sectors % >Units: sectors of 1 * 512 = 512 bytes % >Sector size (logical/physical): 512 bytes / 512 bytes % >I/O size (minimum/optimal): 512 bytes / 512 bytes % ... % >/dev/md127 on /Daten type ext4 (rw,relatime) % ... % >UUID=65ec95df-f83f-454e-b7bd-7008d8055d23 / ext4 % >errors=remount-ro 0 1 % > % >/dev/md127 /Daten ext4 defaults 0 0 You don't see any "filesystem" or, more correctly, partition in your fdisk -l output because you have apparently created your filesystem on the entire device (hey, I didn't know one could do that!). That conclusion is supported by your mount point (/dev/md127 rather than /dev/md127p1 or similar) and your fstab entry (same). So the display isn't interesting, although the logic behind that approach certainly is to me. HTH & HAND :-D -- David T-G See http://justpickone.org/davidtg/email/ See http://justpickone.org/davidtg/tofu.txt