Hi Martin, When I changed to "failed-disk 1" it works, even if I have to use the undocumented special force. Thank you for your help! Now my /proc/mdstat says: # cat /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid5] read_ahead 1024 sectors md0 : active raid1 hda1[0] 64128 blocks [2/1] [U_] unused devices: <none> I have some other questions: How do I interprete the /proc/mdstat information (I understand personalities, but the rest)? At what point should I change to auto-detect filesystem tag? Before or after I have put a filesystem on md0 and before or after I have started to run the raid in non-degraded mode? To change boot device from /dev/hdc1 to /dev/md0 I guess that I use rdev to update the kernel (I'm booting from a floppy for the moment - make zdisk). What is a recommended chunk-size for partitions in this sizes: # df Filesystem 1k-blocks Used Available Use% Mounted on /dev/hdc1 62193 18247 40735 31% / /dev/hdc3 124443 33999 84018 29% /var /dev/hdc5 62193 13 58969 0% /tmp /dev/hdc6 616636 154956 430356 26% /usr /dev/hdc7 5233940 201492 4766576 4% /opt Thanks once more! _\\|//_ (-0-0-) /-------------------------------ooO-(_)-Ooo------------------------------\ | Magnus Sandberg Email: [EMAIL PROTECTED] | | Network Engineer, BlueLabs AB http://www.bluelabs.se/ | | Phone: +46-8-470 2155 (FAX: +46-8-470 2199) GSM: +46-708-225 805 | \------------------------------------------------------------------------/ || || ooO Ooo ----- On 11th of July 2000 Martin Bene wrote; ----- Hi Magnus, > # mkraid /dev/md0 > handling MD device /dev/md0 > analyzing super-block > raid_disk conflict on /dev/hda1 and /dev/hdc1 (0) That's the hint where the problem is :-) > mkraid: aborted, see the syslog and /proc/mdstat for potential clues. > I have tried different config in /etc/raidtab, but for the moment it > looks like: > > # cat /etc/raidtab > raiddev /dev/md0 > raid-level 1 > nr-raid-disks 2 > nr-spare-disks 0 > chunk-size 4 > persistent-superblock 1 > device /dev/hda1 > raid-disk 0 > device /dev/hdc1 > failed-disk 0 > > > Can anyone help me out, both with this problem and to add me to the > maillist? Error in your raidtab file; you're defining disk 0 twice and aren't defining disk 1; make it failed-disk 1 and it should work. The file above will overwrite /dev/hda1 and will keep /dev/hdc1 unchanged. is this what you intended? Bye, Martin PS: don't know about the list config, sorry