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Re: [linux-lvm] PV#s are not unique



Peter,

have never seen this one before ;-)

But anyway:

you need to read te first sector of

/dev/ide/host0/bus1/target1/lun0/part1

and

/dev/ide/host0/bus0/target1/lun0/part1.

Change unsigned int value (4 byte) at decimal offset 432 to 5 for bus1
and to 7 for bus0 which should give you unique numbering of PVs and store
them back to the corresponding disks.

You can achieve that for eg. with:

perl -e '$n=5;($h,$d,$t)=unpack("a432Va76",<>);print pack ("a432Va76",$h,$n,$t);' /dev/ide/host0/bus1/target1/lun0/part1 > b1.tmp;
dd is=b1.tmp of=/dev/ide/host0/bus1/target1/lun0/part1 bs=512; rm b1.tmp
perl -e '$n=7;($h,$d,$t)=unpack("a432Va76",<>);print pack ("a432Va76",$h,$n,$t);' /dev/ide/host0/bus0/target1/lun0/part1 > b0.tmp;
dd is=b0.tmp of=/dev/ide/host0/bus0/target1/lun0/part1 bs=512; rm b0.tmp

Try vgscan again.

Regards,
Heinz    -- The LVM Guy --


On Sat, Dec 08, 2001 at 06:07:37PM +0100, Peter Palfrader wrote:
> Hi,
> 
> I have the following problem:
> 
> I tried to pvmove PEs off of a PV and to remove that PV using vgreduce.
> Unfortunatly it looks as if it did not really work. Now vgscan does not
> find my VG vg_stuff any more.
> 
> 
> I assume this might be the reason:
> 
> | marvin:~# pvdisplay /dev/ide/host?/bus?/target?/lun0/part1 | grep '^PV#'
> | pvdisplay -- no physical volume identifier on "/dev/ide/host0/bus0/target0/lun0/part1"
> | 
> | PV#                   3
> | PV#                   6
> | PV#                   6
> | PV#                   4
> | PV#                   2
> | PV#                   1
> | PV#                   3
> 
> [PV#s are not unique]
> 
> All 7 PVs belond to the same volume group (VG Name: vg_stuff). Now when
> I run vgscan, it does not detect this volumegroup. pvscan shows the PVs
> as associated to an unknown VG.
> 
> Any idea on how to recover from this?  I'm using Logical Volume Manager
> Tools Version 1.0.1-rc4 and kernel version 2.4.12-xfs-lvm1.0.1rc4.
> 
> Thanks in Advance,
> 					yours,
> 					peter
> 
> -- 
>  PGP signed and encrypted  |  .''`.  ** Debian GNU/Linux **
>     messages preferred.    | : :' :      The universal
>                            | `. `'     Operating System.
>  http://www.palfrader.org/ |   `-    http://www.debian.org/

> pvscan -- reading all physical volumes (this may take a while...)
> pvscan -- ACTIVE   PV "/dev/scsi/host0/bus0/target3/lun0/part2" of VG "vg_system" [8.25 GB / 512.00 MB free]
> pvscan -- inactive PV "/dev/ide/host2/bus1/target0/lun0/part1"   is associated to an unknown VG (run vgscan)
> pvscan -- inactive PV "/dev/ide/host2/bus1/target1/lun0/part1"   is associated to an unknown VG (run vgscan)
> pvscan -- inactive PV "/dev/ide/host2/bus0/target0/lun0/part1"   is associated to an unknown VG (run vgscan)
> pvscan -- inactive PV "/dev/ide/host2/bus0/target1/lun0/part1"   is associated to an unknown VG (run vgscan)
> pvscan -- inactive PV "/dev/ide/host0/bus1/target0/lun0/part1"   is associated to an unknown VG (run vgscan)
> pvscan -- inactive PV "/dev/ide/host0/bus1/target1/lun0/part1"   is associated to an unknown VG (run vgscan)
> pvscan -- inactive PV "/dev/ide/host0/bus0/target1/lun0/part1"   is associated to an unknown VG (run vgscan)
> pvscan -- total: 8 [428.54 GB] / in use: 8 [428.54 GB] / in no VG: 0 [0]
> 

> vgscan -- removing "/etc/lvmtab" and "/etc/lvmtab.d"
> vgscan -- creating empty "/etc/lvmtab" and "/etc/lvmtab.d"
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- scanning for all active volume group(s) first
> vgscan -- found active volume group "vg_system"
> vgscan -- reading data of volume group "vg_system" from physical volume(s)
> vgscan -- inserting "vg_system" into lvmtab
> vgscan -- backing up volume group "vg_system"
> vgscan -- checking volume group name "vg_system"
> vgscan -- checking volume group consistency of "vg_system"
> vgscan -- checking existence of "/etc/lvmtab.d"
> vgscan -- storing volume group data of "vg_system" in "/etc/lvmtab.d/vg_system.tmp"
> vgscan -- storing physical volume data of "vg_system" in "/etc/lvmtab.d/vg_system.tmp"
> vgscan -- storing logical volume data of volume group "vg_system" in "/etc/lvmtab.d/vg_system.tmp"
> vgscan -- renaming "/etc/lvmtab.d/vg_system.tmp" to "/etc/lvmtab.d/vg_system"
> vgscan -- removing special files and directory for volume group "vg_system"
> vgscan -- creating directory and group character special file for "vg_system"
> vgscan -- creating block device special files for vg_system
> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> vgscan -- WARNING: This program does not do a VGDA backup of your volume group
> 

> --- Physical volume ---
> PV Name               /dev/ide/host0/bus0/target1/lun0/part1
> VG Name               vg_stuff
> PV Size               38.35 GB / NOT usable 2.69 MB [LVM: 125.00 KB]
> PV#                   3
> PV Status             available
> Allocatable           yes
> Cur LV                1
> PE Size (KByte)       32768
> Total PE              1227
> Free PE               1159
> Allocated PE          68
> PV UUID               d2skhN-h8w6-BzUz-joKn-Wad5-oN22-bw5O7i
> 
> --- Physical volume ---
> PV Name               /dev/ide/host0/bus1/target0/lun0/part1
> VG Name               vg_stuff
> PV Size               57.27 GB / NOT usable 52.14 MB [LVM: 131.00 KB]
> PV#                   6
> PV Status             available
> Allocatable           yes
> Cur LV                1
> PE Size (KByte)       32768
> Total PE              1831
> Free PE               660
> Allocated PE          1171
> PV UUID               Et6EvH-2q6q-sgf1-4WgR-emQF-n4nw-o0Dx1j
> 
> --- Physical volume ---
> PV Name               /dev/ide/host0/bus1/target1/lun0/part1
> VG Name               vg_stuff
> PV Size               57.27 GB / NOT usable 52.14 MB [LVM: 131.00 KB]
> PV#                   6
> PV Status             available
> Allocatable           yes
> Cur LV                0
> PE Size (KByte)       32768
> Total PE              1831
> Free PE               1831
> Allocated PE          0
> PV UUID               fL3U3f-yFiv-4mxi-pDId-v02W-wzZL-YDCElL
> 
> --- Physical volume ---
> PV Name               /dev/ide/host2/bus0/target0/lun0/part1
> VG Name               vg_stuff
> PV Size               76.34 GB / NOT usable 55.22 MB [LVM: 133.00 KB]
> PV#                   4
> PV Status             available
> Allocatable           yes (but full)
> Cur LV                1
> PE Size (KByte)       32768
> Total PE              2441
> Free PE               0
> Allocated PE          2441
> PV UUID               sP1cxE-MPdJ-zAQt-jGjs-RObn-I1KF-n2MEL2
> 
> --- Physical volume ---
> PV Name               /dev/ide/host2/bus0/target1/lun0/part1
> VG Name               vg_stuff
> PV Size               38.34 GB / NOT usable 28.38 MB [LVM: 125.00 KB]
> PV#                   2
> PV Status             available
> Allocatable           yes
> Cur LV                0
> PE Size (KByte)       32768
> Total PE              1226
> Free PE               1226
> Allocated PE          0
> PV UUID               VEx44c-TcOv-GHsR-gNip-7mWv-zU1w-UDE0w9
> 
> --- Physical volume ---
> PV Name               /dev/ide/host2/bus1/target0/lun0/part1
> VG Name               vg_stuff
> PV Size               76.34 GB / NOT usable 23.22 MB [LVM: 130.00 KB]
> PV#                   1
> PV Status             available
> Allocatable           yes (but full)
> Cur LV                1
> PE Size (KByte)       32768
> Total PE              2442
> Free PE               0
> Allocated PE          2442
> PV UUID               EGp6Xa-CJia-693v-C1nh-t4aO-Pat8-CUJNe3
> 
> --- Physical volume ---
> PV Name               /dev/ide/host2/bus1/target1/lun0/part1
> VG Name               vg_stuff
> PV Size               76.34 GB / NOT usable 55.22 MB [LVM: 133.00 KB]
> PV#                   3
> PV Status             available
> Allocatable           yes (but full)
> Cur LV                1
> PE Size (KByte)       32768
> Total PE              2441
> Free PE               0
> Allocated PE          2441
> PV UUID               fpFhZ5-TyYJ-FW5P-HLcV-UIdz-jYQe-62DJea
> 
> 

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen Sistina com                           +49 2626 141200
                                                       FAX 924446
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