[linux-lvm] VG incorrectly displayed/unusable

[Murthy Kambhampaty]

After reinstalling Redhat 8.0 on a server system, I am having an odd
problem: vgscan recognizes the various VGs on the system, VGsys, VGdata0 and
VGdb01. However, LVM seems to confuse VGdata0 and VGsys - "/sbin/vgdisplay
VGdata0" produces a VGdisplay for VGsys and "/sbin/lvscan" shows duplicate
information for VGsys. As shown below, "/sbin/vgdisplay -D VGdata0" shows
the correct information for VGdata0.

I am thinking of booting to the Redhat 8.0 installer's rescue mode
, vgexport-ing VGdata0, reboot to the system and "vgimport"-ing VGdata0 (and
its PVs). Is this likely to solve the problem (I half-expect that all that
vgexport does is remove the VG config from the "old" system in preparation
for moving the volume, so I'm not sure this will do me any good.)

The system runs RedHat Linux 8.0 with the latest updates, and the 2.4.21
kernel with xfs patches (LVM userspace has been updated to
redhat/contribs/libc6/SRPMS/lvm-1.0.5-1.src.rpm rebuilt on this system).
Hardware is 
Supermicro Super8050
AIC79XX (onboard u160, connects VGsys)
DAC960 (Acceleraid 352, connects VGdata0)
aacraid (Adaptec 2200s, connects VGdb01)

One thing to note is that one of the PVs in VGdata0 is a whole (HW RAID-5
logical) disk.

Listed below are output from:
/sbin/vgdisplay -D VGdata0
/sbin/vgdisplay VGdata0
and
/sbin/pvdisplay

Thanks for the help,
   Murthy



# /sbin/vgdisplay -D VGdata0
--- Volume group ---
VG Name               VGdata0
VG Access             read/write
VG Status             NOT available/resizable
VG #                  0
MAX LV                256
Cur LV                3
Open LV               0
MAX LV Size           2 TB
Max PV                256
Cur PV                2
Act PV                2
VG Size               266.16 GB
PE Size               32 MB
Total PE              8517
Alloc PE / Size       5185 / 162.03 GB
Free  PE / Size       3332 / 104.12 GB
VG UUID               QmFOyx-ILlI-uNTb-z4hG-ZDnD-kL3Q-UyJGEZ


# /sbin/vgdisplay VGdata0
--- Volume group ---
VG Name               VGsys
VG Access             read/write
VG Status             available/resizable
VG #                  0
MAX LV                256
Cur LV                4
Open LV               4
MAX LV Size           255.99 GB
Max PV                256
Cur PV                1
Act PV                1
VG Size               31.65 GB
PE Size               4 MB
Total PE              8103
Alloc PE / Size       8103 / 31.65 GB
Free  PE / Size       0 / 0
VG UUID               DWvjLY-tFNc-cxXU-epjF-vaEx-uEAA-IM3CtK


# /sbin/lvscan
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- inactive PV "/dev/rd/c0d0p4" of VG "VGdata0" [129.38 GB /
104.12 GB free]
pvscan -- inactive PV "/dev/rd/c0d1"   of VG "VGdata0" [136.78 GB / 0
free]
pvscan -- ACTIVE   PV "/dev/md2"       of VG "VGsys"   [31.65 GB / 0
free]
pvscan -- ACTIVE   PV "/dev/sdc1"      of VG "VGdb01"  [67.75 GB / 0
free]
pvscan -- ACTIVE   PV "/dev/sdd1"      of VG "VGdb01"  [271.12 GB / 0
free]
pvscan -- total: 5 [636.88 GB] / in use: 5 [636.88 GB] / in no VG: 0 [0]