David <[EMAIL PROTECTED]> writes: > Finally, there is a complex idea suggested by Dan Christensen: > > Create multiple partitions on each device: > sda1,sda2,sda3,sda4 > sdb1,sdb2,sdb3,sdb4 > etc > > create 1 raid5 device for each partition > md0=sda1+sdb1+sdc1 > md1=sda2+sdb2+sdc2 > > finally lvm all these together. > > now to add a drive you must: > * add a backup device to the lvm > for each md device > * lvm move the blocks of 1 md device to a backup device > * remove md device from lvm > * destroy + rebuild the md device > * add back to lvm > * lvm move the blocks of the backup device > * remove backup device from lvm
Ah, that's more detailed than I had worked out, which is why I didn't recognize the summary of it you had given! :-) I didn't even know lvm had a move option. > Dan's solution (proper credit!) You mean David's solution? :-) > is probably the safest but is time consuming and possibly > human-error prone. I might try the above, but substituting raidreconf for the destroy/rebuild/lvm move steps. Or I might just use raidreconf without a backup (after reading the kernel-raid archives, as you suggested...) Thanks for the ideas! Dan
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