As I understand it, reshape for RAID6 is coming now. It is in the 2.6.21 kernel still at rc4 as of today though. I am looking forward to it, and plan to give it a test run when it released. I have used lv with my past raid sets and it is very nice, adds some flexibility. I have also done a RAID5 reshape that was in an lv. Unfortunately, at the time I had an older LVM version that did not support pvresize. So I was stuck with a larger RAID set and my lv would not take advantage of it. I think I needed LVM version 2.02.06 to solve that and get the pvresize feature. If you are running a relatively new disto that won't be an issue any more. I think I had FC3 or 4. -----Original Message----- From: Gordon Henderson [mailto:gordon@xxxxxxxxxx] Sent: Friday, March 23, 2007 11:35 AM To: Mattias Wadenstein Cc: linux-raid@xxxxxxxxxxxxxxx Subject: Re: Grow a RAID-6 ? On Fri, 23 Mar 2007, Mattias Wadenstein wrote: > On Fri, 23 Mar 2007, Gordon Henderson wrote: > >> Are there any plans in the near future to enable growing RAID-6 arrays by >> adding more disks into them? >> >> I have a 15x500GB - drive unit and I need to add another 15 drives into >> it... Hindsight is telling me that maybe I should have put LVM on top of >> the RAID-6, however, the usable 6TB it yields should have been enough for >> anyone... > > Well, if you are doubling the space, you could take this opportunity to put > lvm on the new disks, move all the data, then put in the old disks as a pv, > extending the lvm space. Now why didn't I think of that. *thud* > I really wouldn't recommend having a 30-disk raid6, imagine the rebuild time > after a failed disk.. There is that - it would give me 2 disks (ie. 1TB) more space though... This isn't a performance limited server though, it's an off-site backup box, so it just has to be reasonably reliable. Thanks! Gordon - 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 - 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
