[linux-lvm] vgscan problem (was vgscan segmentation faults, VG name problems)

[Duane Evenson <devenson@shaw.ca>]

I've upgraded to 1.0.7 but now get the following output - indicating the 
real problem.
If I recreate the volume group and logical volume, will the data 
contained therein still be available or is there another way to recover 
the volume?
vgscan -v
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 -- reading data of volume group "data_group" from physical volume(s)
vgscan -- ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of 
volume
group "data_group" from physical volume(s)
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: This program does not do a VGDA backup of your volume 
group

Some other information of the system:

# pvdisplay /dev/hde
--- Physical volume ---
PV Name               /dev/hde
VG Name               data_group
PV Size               111.79 GB [234441648 secs] / NOT usable 4.25 MB 
[LVM: 239
KB]
PV#                   1
PV Status             available
Allocatable           yes
Cur LV                1
PE Size (KByte)       4096
Total PE              28617
Free PE               3017
Allocated PE          25600
PV UUID               x1l2a2-XUzX-XEjZ-hP3k-qAmo-G5jH-U1z1C8


# vgcfgrestore   -n data_group -ll
vgcfgrestore -- INFO: using backup file "/etc/lvmconf/data_group.conf"
--- Volume group ---
VG Name               data_group
VG Access             read/write
VG Status             NOT available/resizable
VG #                  0
MAX LV                256
Cur LV                1
Open LV               0
MAX LV Size           255.99 GB
Max PV                256
Cur PV                1
Act PV                1
VG Size               111.79 GB
PE Size               4 MB
Total PE              28617
Alloc PE / Size       25600 / 100 GB
Free  PE / Size       3017 / 11.79 GB
VG UUID               rVEO6Y-kq5c-5SR0-uw0I-VPF1-v1ka-HK1WQS

--- Logical volume ---
LV Name                /dev/data_group/logical_volume1
VG Name                data_group
LV Write Access        read/write
LV Status              NOT available
LV #                   1
# open                 0
LV Size                100 GB
Current LE             25600
Allocated LE           25600
Allocation             next free
Read ahead sectors     10000
Block device           58:0


--- Physical volume ---
PV Name               /dev/hde
VG Name               data_group
PV Size               111.79 GB [234441648 secs] / NOT usable 4.25 MB 
[LVM: 239
KB]
PV#                   1
PV Status             available
Allocatable           yes
Cur LV                1
PE Size (KByte)       4096
Total PE              28617
Free PE               3017
Allocated PE          25600
PV UUID               x1l2a2-XUzX-XEjZ-hP3k-qAmo-G5jH-U1z1C8


Heinz J . Mauelshagen wrote:

>Duane,
>
>since you're running 1.0.3 I assume you might be hitting an array derefenerence
>bug in the LVM1 library we fixed in 1.0.6.
>
>Please upgrade to 1.0.7 and try again.
>
>Regards,
>Heinz    -- The LVM Guy --
>
>On Sun, Apr 27, 2003 at 12:22:59PM -0600, Duane Evenson wrote:
>  
>
>>I'm having troubles and can't find the solution in the HOWTO, or the 
>>archived mailing lists articles.
>>I installed lvm on an entire hard drive (hde), made one logical group 
>>with a logical volume of 100G.
>>I mounted to volume, copied files over OK, but vgscan caused 
>>segmentation faults.
>>I rebooted, hoping that it was a conflict between the kernel info and 
>>physical info. Obviously, it wasn't.
>>Here are the results of running pvdisplay, pvscan, vgscan, and vgdisplay.
>>
>># pvdisplay /dev/hde -v
>>--- Physical volume ---
>>PV Name               /dev/hde
>>VG Name               data_group
>>PV Size               111.79 GB [234441648 secs] / NOT usable 4.25 MB 
>>[LVM: 239
>>KB]
>>PV#                   1
>>PV Status             available
>>Allocatable           yes
>>Cur LV                1
>>PE Size (KByte)       4096
>>Total PE              28617
>>Free PE               3017
>>Allocated PE          25600
>>PV UUID               x1l2a2-XUzX-XEjZ-hP3k-qAmo-G5jH-U1z1C8
>>
>>pvdisplay -- "/etc/lvmtab.d/data_group" doesn't exist
>>
>># pvscan -v
>>pvscan -- reading all physical volumes (this may take a while...)
>>pvscan -- walking through all physical volumes found
>>pvscan -- inactive PV "/dev/hde"  is associated to unknown VG 
>>"data_group" (run
>>vgscan)
>>pvscan -- total: 1 [111.79 GB] / in use: 1 [111.79 GB] / in no VG: 0 [0]
>>
>># vgscan -v
>>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 -- reading data of volume group "data_group" from physical volume(s)
>>Segmentation fault
>>
>># vgscan -d
>>...
>><55555> pv_create_name_from_kdev_t -- LEAVING with dev_name: /dev/hde
>><55555> system_id_check_exported -- CALLED
>><55555> system_id_check_exported -- LEAVING with ret: 0
>><4444> pv_read -- LEAVING with ret: 0
>><4444> vg_copy_from_disk -- CALLED
>><55555> vg_check_vg_disk_t_consistency -- CALLED
>><666666> vg_check_name -- CALLED with VG:
>><7777777> lvm_check_chars -- CALLED with name: ""
>><7777777> lvm_check_chars -- LEAVING with ret: 0
>><666666> vg_check_name -- LEAVING with ret: 0
>><55555> vg_check_vg_disk_t_consistency -- LEAVING with ret: -344
>><4444> vg_copy_from_disk -- LEAVING
>>Segmentation fault
>>
>># vgdisplay data_group -h
>>Logical Volume Manager 1.0.3
>>Heinz Mauelshagen, Sistina Software  19/02/2002 (IOP 10)
>>
>>vgdisplay -- display volume group information
>>
>>
>>
>>
>>
>>
>>_______________________________________________
>>linux-lvm mailing list
>>linux-lvm@sistina.com
>>http://lists.sistina.com/mailman/listinfo/linux-lvm
>>read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>>    
>>
>
>*** Software bugs are stupid.
>    Nevertheless it needs not so stupid people to solve them ***
>
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
>Heinz Mauelshagen                                 Sistina Software Inc.
>Senior Consultant/Developer                       Am Sonnenhang 11
>                                                  56242 Marienrachdorf
>                                                  Germany
>Mauelshagen@Sistina.com                           +49 2626 141200
>                                                       FAX 924446
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
>_______________________________________________
>linux-lvm mailing list
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>read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
>  
>