Hi Dan,

see thread http://www.spinics.net/lists/raid/msg07742.html.

Regards,
Robert

Dan Graham schrieb:

Hello;
  I have an existing, active ext3 filesystem which I would like to 
convert to
a RAID 1 ext3 filesystem with minimal down time.  After casting about 
the web and experimenting some on a test system, I believe that I can 
accomplish this in the following manner.

  - Dismount the filesystem.
  - Shrink the filesystem to leave room for the RAID superblock at the 
end
    while leaving the partition size untouched (shrinking by 16 blocks 
seems to
    work )
  - Create a degraded array with only the partition carrying the 
shrunk ext3
    system
  - start the array and mount the array.
  - hot add the mirroring partitions.

The questions I have for those who know Linux-Raid better than I.

   Is this scheme even half-way sane?
   Is 16 blocks a large enough area?


Thanks in advance for any and all feed-back.