On Sun, Aug 27, 2006 at 07:51:09AM -0400, Matthew Gillen wrote: > Andy Smith wrote: > > On Sun, Aug 27, 2006 at 01:20:26PM +0800, Jim Morgan wrote: > >> Basically you have to force one disk to fail using the raid > >> administration software. You then remove the disk, replace it with > >> the bigger disk, and rebuild it from the first one. The partition > >> sizes may need adjusting. Then you force the other disk to fail, and > >> replace it with the larger one, and then rebuild it from the other large > >> disk. > > > > Well I would then be left with two large disks where sd[ab]5 (and > > the sd[ab]4 primary partition that sd[ab]5 is the only logical > > partition within) does not extend all the way to the end of the > > disk. I wasn't aware that you could resize RAID-1 md arrays though, > > I thought it was restricted to RAID-5. Is this not the case? > > To add another "I'm not an expert" opinion: > Supposing you can get all 4 disks in the server at the same time, I can't; it's a rackmount server with only two disk bays and two SATA ports on the motherboard. I could have it open with another 2-port SATA controller on a PCI card, but this seems to be going a bit far. Since I only want to give the extra space to the single volume group then it seems I should be able to follow this method: http://www.debian-administration.org/articles/424 (basically involves doing what Jim said: failing out one disk, replacing it with a bigger one, failing the other, replacing it, then expanding partitions and filesystems.) Seems that "mdadm --grow" works even with a RAID-1 which I wasn't aware of. The only problem then remaining would be how would I grow the single pv/vg out to the full extent of the new larger block device it would be on. There doesn't seem to be a pvresize in Debain Sarge's lvm2 package.. LVM version: 2.01.04 (2005-02-09) Library version: 1.01.00-ioctl (2005-01-17) Driver version: 4.5.0 I see from: http://www.robot101.net/2005/05/20/resizing-lvm2-physical-volumes/ that lvm2 has had pvresize since 2.02.00 so if I upgrade userland tools (my kernel is 2.6.16.19) then would I just need to do a pvresize after expanding the block device that my single pv/vg is on? Cheers, Andy
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