From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) Description of problem: When I set a device as failed on a raid 5 that is curently in use (mounted fs) using the command : # mdadm /dev/md0 -f /dev/hdb1 the command freeze and any mdadm or access to the mounted fs fail Version-Release number of selected component (if applicable): How reproducible: Didn't try Steps to Reproduce: 1. mdadm -C -l5 -n3 -x1 /dev/md0 /dev/sdb[1234] 2. mke2fs -j /dev/md0 ; mount /dev/md0 /mnt 3. while sleep 1 ; do date >> /mnt/log ; done & 4. tail -f /mnt/log 5. mdadm /dev/md0 -f /dev/sdb1 Actual Results: the mdamd command never finish and any access to /mnt or mdadm command fail ! If /dev/md0 is not in use (no access to the mounted fs) this works I have to restart the machine and restart/repair/reconstruct the raid device If the root in on an raid device too, the machine will refuse to restart ! Additional info: I was making some test/exercise on an rh8.0 to learn mdadm and know what to do to replace a failed disk. I was first making test using /dev/loop? then tried real device /dev/hdb* to know if the probleme was about /dev/loop. The same probleme append with a RH7.3 too: Both (rh73 and rh80) use kernel 2.4.18. I tried an an RH72 kernel 2.4.7 and it was working fine.
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