I'm beginning to find my way around the internals of LVM1. But I am still
mystified by this situation. PV3 (/dev/md3) is active and running
according to /proc
[root@cmslax lvm]# cat /proc/lvm/VGs/rootvg/PVs/md3
name: /dev/md3
size: 35374848
status: 1
number: 3
allocatable: 2
LV current: 0
PE size: 32768
PE total: 538
PE allocated: 57
device: 09:03
uuid: YfvI-pix3-CgxK-rRj1-T2Gu-tzu1-tpsl-8t01
I can read md3 just fine. So can vgck:
[root@cmslax lvm]# vgck -v
vgck -- locking logical volume manager
vgck -- finding all volume group(s)
vgck -- checking volume group name "rootvg"
vgck -- checking existence of volume group "rootvg"
vgck -- reading volume group data for "rootvg" from lvmtab
vgck -- checking volume group consistency of "rootvg" in lvmtab
vgck -- VGDA of "rootvg" in lvmtab is consistent
vgck -- reading volume group data for "rootvg" from physical volume(s)
vgck -- checking volume group consistency of "rootvg" on physical volumes
vgck -- VGDA of "rootvg" on physical volumes is consistent
vgck -- unlocking logical volume manager
So can vgdisplay -D. Here is a diff of vgdisplay -v with/without -D:
4c4
< VG Status NOT available/resizable
---
> VG Status available/resizable
8c8
< Open LV 0
---
> Open LV 9
26c26
< # open 0
---
> # open 1
...
185c185
< PV Status NOT available / allocatable
---
> PV Status available / allocatable
Why does the ondisk metadata for md3 get set to NOT available? If
LVM was able to write the flag to md3, how could it not be
available? Where is the flag? Can I patch it by hand? Why does
vgck not complain about the NOT available PV? (Perhaps because it
is reading from lvmtab.d to enumerate PVs?) vgscan *does* complain,
and truncates lvmtab.d/rootvg.
--
Stuart D. Gathman <stuart@bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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