[linux-lvm] rescuing a VG with one missing PV

[Erkki Seppala]

On Tue, Feb 12, 2002 at 03:05:51PM +0100, Heinz J . Mauelshagen wrote:
> Get LVM from CVS at www.sistina.com and either use the -s option of pvcreate
> I implemented recently to fake the size you need or run "vgcfgrestore -i ..."
> which ignores the size of the device and restores metadata anyway
> at your own risk.

Thanks! This seems to be doing the trick. There seemed to be one typo
in the CVS at the moment I checked out my version, but I imagine it'll
be fixed as soon as someone tries to compile it :-) :

---8<---
Index: vgscan.c
===================================================================
RCS file: /data/cvs/LVM/tools/vgscan.c,v
retrieving revision 1.12
diff -u -r1.12 vgscan.c
--- vgscan.c    2002/02/08 14:59:37     1.12
+++ vgscan.c    2002/02/12 21:29:00
@@ -294,7 +294,7 @@
                for ( blk_dev = l = 0; l < vg->lv_max; l++) {
                   lv = vg->lv[l];
                   if ( lv == NULL) continue;
-                  if ( lvm_tab_check_free_lv_number ( lv) == FALSE) {
+                  if ( lvm_tab_check_free_lv_numbers ( lv) == FALSE) {
                      printf ( "%s -- changing minor number on \"%s\"\n",
                               cmd, lv->lv_name);
                      if ( lv->lv_access & LV_SNAPSHOT_ORG) {
---8<---

> Even though you lost your data anyway with the old drive, you need
> to either pvmove it away to get rid of allocated extents in that PV
> again or lvreduce LVs to make them free which you potentially don't
> like, because the extents might be further to the beginning of the
> LV.

I don't completely understand this, but I guess I will when the pvmove
has completed - it's a surprisingly slow operation. I was glad to
notice though that only one logical volume was in the failed disc.

Once again, thanks for the help :).
-- 
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