On Wednesday January 24, vidar.sonerud@xxxxxxxxx wrote: > I have for a long time been wondering if it is possible to convert a 2 > disk Raid-1 array to a 3 disk Raid-5 array using mdadm? > > Tonight I stumbled upon this article: > > http://www.n8gray.org/blog/2006/09/05/stupid-raid-tricks-with-evms-and-mdadm/ > > Is this safe / ok to do? Any comments from you mdadm experts? Yes, that should be safe - in principle. I've never used EVMS tools so I cannot comment on the particular commands that the article says to run. I would do it with mdadm: 1/ stop the array mdadm -S /dev/md0 2/ Recreated as a RAID5 array mdadm -C /dev/md0 -l5 -n2 --assume-clean /dev/sda1 /dev/sdb1 3/ Add a spare mdadm /dev/md0 -a /dev/sdc1 4/ Grow the array mdadm -G /dev/md0 -n 3 all done. Of course you have to change the device names to fit your hardware. NeilBrown - 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
