On Sun, Feb 24, 2002 at 02:56:40AM -0600, Chris Abbey wrote: > Howdy all, > I've searched through the archives and how-to's but I see > no mention of this concept anywhere. I'm hoping someone can point > me twoard a tool to accomplish it. > > What I have today is one VG with the following PVs: > > PV Name (#) /dev/sda3 (1) > PV Status available / allocatable > Total PE / Free PE 1666 / 172 > > PV Name (#) /dev/sdb2 (2) > PV Status available / allocatable > Total PE / Free PE 1666 / 322 > > The drives that these PVs come from are allocated as such: > > Device Boot Start End Blocks Id System > /dev/sda1 * 1 131 1052226 83 Linux > /dev/sda2 132 163 257040 82 Linux swap > /dev/sda3 164 588 3413812+ 8e Linux LVM > /dev/sda4 589 1105 4152802+ c Win95 FAT32 (LBA) > /dev/sdb1 1 163 1309266 b Win95 FAT32 > /dev/sdb2 164 588 3413812+ 8e Linux LVM > /dev/sdb4 589 1106 4160835 83 Linux > > I want to nuke sda4 and sdb4 and add the space they > occupy to the PVs on sda3 and sdb2. Well, we don't have a pvextend (so far ;-) > If these were ext2 fs' > or were striped together with md this would be trivial: open > fdisk, delete the last two partitions create a new, unified, > partition in their place, write the table, repeat on the other > drive, then use e2resize to push the filesystems into the new > space. But how do I do this with PVs? I assume the fdisk > adjustment will still be needed, but what is the corresponding > e2resize command for a PV? Or will they just see the added > space and grow to fit? No pvextend :( Should start to code it... But rather than the way below, why don't you "pvcreate /dev/sd[ab]4" after setting their partition type to Linux LVM and vgextend them to your VG? The metadata overhead given is very small compared to the device sizes of sd[ab]4. The only thing you need to take care of is, that you don't create striped LVs on one physical disk. If you want to create some of those, you need to use lvcreate -L YourSize -i 2 -n YourLVName YourVG /dev/sda3 /dev/sdb2 - or - lvcreate -L YourSize -i 2 -n YourLVName YourVG /dev/sda4 /dev/sdb4 to avoid striping over to partitions of the same physical disk. > > I have dreamed up a rather ugly way to accomplish > this, kinda-sorta.... I could create a second PV on one > of the drives, say as sdb4... then pvmove the PV from the > other drive into that, then create a new PV on the first > drive of the full size, then add that to the VG, then pvmove > the data from both of the small PVs into the large one, then > pvremove them and create a replacement large PV in their place > and add it to the VG. The end result of that though would be > that all my data was on one drive... the advantage of striping > over two drives would be shot to hell. I measured a healthy > performance boost when I moved to striping two drives, I'm not > keen to loose that, and as far as I can tell, there is no tool > to rebalance the PEs over several PVs. Or did I miss something? > > Any suggestions appreciated. > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html -- Regards, Heinz -- The LVM Guy -- *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
