On Tue, 25 Nov 2014 12:01:58 +0100 cvb@xxxxxxxxxxx wrote: > Hi > > Am 2014-11-25 10:25, schrieb Carsten Aulbert: > > Without much thinking, I would simply follow the wiki page, mark a > > device as failed, remove it, repartition it, add it again, and wait > > for sync to complete. Repeat for all 4 devices and finally --grow with > > mdadm (followed by xfs resizing) - and of course, all online, while > > machine is in flight. > > That is exactoy what I did with my RAID 10 a bit more than a year ago. > It basically worked, but there was one caveat... some part (the > ---grow?) which required a certain kernel version for which I had booted > a live CD back then... > > The thing is, I can't exactly remember what the caveat was. And as I'm > about to grow the RAID again (having replaced all hard drives already), > I have been looking for the related mails in the archive of this list, > but I can't seem to find them... > > So I guess we'll have to hope that Neil replies again. I recommend creating some loop-back block devices and experimenting. But I'm fairly sure that "far" RAID10 arrays cannot be reshaped at all. NeilBrown
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