Hy The storry I have changed my raid5 array from a PC with Debian Sarge -kernel2.4.26 to an other machine with a Debian Sarge -kernel 2.6.8 this has work but not so fine the array in new machine doesn't run automaticaly but if I make the command raidstart /dev/md0 the array starts, but with errors like this fatmama:~# raidstart /dev/md0 md: sda1 has invalid sb, not importing! md: could not import unknown-block(8,1)! md: autostart unknown-block(0,2049) failed! /dev/md0: Invalid argument but anyway I was able to mount the /dev/md0 but I did not want to have this errors, and I have updated from raidtools2 to mdadm than i have read a message at the installation-progress that I should make the command mdadm --zero-superblock /dev/xxx ok after installation I have do this at first with the command mdadm --zero-superblock /dev/md0 than I had a message like this on /dev/md0 it has no superblock ok I make this command mdadm --zero-superblock /dev/sda1 mdadm --zero-superblock /dev/sdb1 and so one this had work but when I have make all this superblock-commands, the raidarray was not active and now I had the problem when I want start the raid-array with mdadm --run /dev/md0 I had anyway an error like this no superblock on /dev/md0 now I have removed the mdadm and reinstall the raidtools2 and test to start the array with raidstart /dev/md0 it was the same >> no superblock now I had want to write a new superblock with fatmama:~# mkraid --upgrade /dev/md0 handling MD device /dev/md0 analyzing super-block disk 0: /dev/sda1, 17920476kB, raid superblock at 17920384kB cannot upgrade magic-less superblock on /dev/sda1 ... mkraid: aborted, see the syslog and /proc/mdstat for potential clues. this was the output I have also tested the same with the mdadm --assemble command the same: cannot write superblock what can I do that my raid-array works? how can I write the superblocks, so that I can start the array,without destroying the datas? I'm sure that they are on the not startable array, because I haven't make a mkraid /dev/md0 and I also not formatet the disk I was reading through all the web, and I have only found questions but no answers about this problem I would be very happy when I could start my raid-array Thanks a lot for your (I hope it) helpfull answer - 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
