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Hi, I am trying desperately to convert my /dev/hda2 to /dev/md0, using /dev/hdb2 as additional device. mdadm --create /dev/md0 -l 1 -n 2 /dev/hdb2 missing works fine, although "mdadm --examine /dev/md0" tells me that there is no valid superblock on /dev/md0 (expected [...], got 00000000). I've put a filesystem on /dev/md0, mounted it and copied everything from my previous system (/dev/hda2) to /dev/md0. Next, I've set the partition type to "fd" (for /dev/hdb2 and /dev/hda2). Now I try to hot-add /dev/hda2 to the raid set: mdadm --manage --add /dev/md0 /dev/hda2 (or mdadm --add /dev/md0 /dev/hda2) Unfortunately, I get the following error message: hot add failed for /dev/hda2: invalid argument. I did not create a mdadm configuration file. The same happens when I use mkraid and hotraidadd, using /etc/raidtab. Further Information: Kernel: 2.4.20-4GB with RAID1-Support Boot Messages: md: raid1 personality registered as nr. 3 md: md driver 0.90.0 [...] md: Autodetection RAID array. [events: 00000000] md: invalid raid superblock magic on hda2 nd; hda2 has invalid sb, not importing! md: could not import hda2! md: autorun ... md: ... autorun DONE. And then, later: Initializing Multiple Devices... considering /dev/md0 /dev/md0 ist not a RAID0 or LINEAR array, skipping. [events: 00000004] md: autorun ... md: configuring hdb2 md: adding hdb2 ... md: created md0 md: bind <hdb2,1> md: running: <hdb2> md: hdb2's event counter: 00000004 [...] raid1: raid set md0 active with 1 out of 2 mirrors md: updating md0 RAID superblock on device [...] md: invalid raid superblock magic on md0 md: md0 hat invalid sb, not importing [...] md: ... autorun DONE. ------------- Any hints?
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