On Wed, 23 Mar 2011 09:07:56 +0100 (CET) Mikael Abrahamsson <swmike@xxxxxxxxx> wrote: > On Wed, 23 Mar 2011, Stefan Roese wrote: > > > I'm currently in the process of converting a 3 disk RAID5 array into a 4 > > disk RAID5 array. I'm using mdadm 3.1.4 and Linux kernel 2.6.35-28-generic > > (Ubuntu). My questions now is this conversion save in a live (running) > > system? Or is this now allowed/supported? > > I guess you wanted to say "4 disk RAID6 array"? > > In that case, yes, I have done it on 2.6.32 and mdadm version (something > older) and it went just fine. > > Neil wrote about it here <http://neil.brown.name/blog/20090817000931>. Additionally, I suggest that you also check "man mdadm" and note the "--layout=preserve" option, if you use it, the RAID5 to RAID6 conversion while adding one disk will happen instantly, without restriping (but only with a resync of the new drive). -- With respect, Roman
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