From: Phillips_Sean@emc.com
Date: Tue Apr 26 2005 - 23:30:15 EDT
Gurus,
Postings in the archives seem to indicate that LVM may have 'issues' when
extending a VG with larger PV's than it's presently configured with.
In my case, we have 4x12gb LUNs. We want to add 3x68gb LUN's as a mirror
during a migration, and eventually expand the LV's on the remaining PE's.
Here's the preliminary plan:
1. Existing disks are /dev/dsk/c4t1d1 /dev/dsk/c4t1d2 /dev/dsk/c4t1d3
/dev/dsk/c4t1d4
2. # vgextend vg01 /dev/dsk/c1t1d1 /dev/dsk/c1t1d2 /dev/dsk/c1t1d3
3. # lvextend -m 1 /dev/vg01/lv01 /dev/dsk/c1t1d1 /dev/dsk/c1t1d2
/dev/dsk/c1t1d3
4. ....wait....until....mirrored....then...
5. # lvreduce -m 0 /dev/vg01/lv01 /dev/dsk/c1t1d1 /dev/dsk/c1t1d2
/dev/dsk/c1t1d3
6. Remove the original disks--> # vgreduce /dev/vg01 /dev/dsk/c4t1d1
/dev/dsk/c4t1d2 /dev/dsk/c4t1d3 /dev/dsk/c4t1d4
The real question is whether or not there truly is an issue when extending
VG's with larger volumes?
Thanks,
Sean
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