[linux-lvm] pvscan does not detect lvm1 exported volume group

[Nico Stuurman]

While trying to upgrade from RedHat 9 (2.4 kernel) to Mandriva 2007  
(2.6 kernel) I needed to export and re-import a lvm volume group.   
The volume group is build from two RAID5 volumes on 3ware RAID  
cards.  In RedHat 9 (using lvm tools version 1.0.3) I can inactivate  
and export the volume group (using vgchange -an and vgexport).   
However, this exported volume group is not detected using the  
Mandriva 2007 system (which, I presume, uses a recent version of  
lvm2).  pvscan simply does not detect the volume group.

The relevant output of pvscan -vvvv is copied below.  The volume  
group consists of /dev/sdb1 and /dev/sdc1.  Apparently, pvscan sees  
some kind of md raid information on /dev/sdb1 and decides to skip it?

After rebooting in RedHat 9, pvscan (1.0.3) sees the volume group  
and  vgimport imports it fine.

Is there any way I can move this volume group to a kernel 2.6 system  
that uses the lvm2 tools?

Thanks!


Nico


#device/dev-io.c:437         Opened /dev/sdb RO
#device/dev-io.c:264       /dev/sdb: size is 2734359936 sectors
#device/dev-io.c:134         /dev/sdb: block size is 4096 bytes
#filters/filter.c:112         /dev/sdb: Skipping: Partition table  
signature found
#device/dev-io.c:483         Closed /dev/sdb
#device/dev-io.c:437         Opened /dev/sdb1 RO
#device/dev-io.c:264       /dev/sdb1: size is 2734359327 sectors
#device/dev-io.c:483         Closed /dev/sdb1
#device/dev-io.c:264       /dev/sdb1: size is 2734359327 sectors
#device/dev-io.c:437         Opened /dev/sdb1 RO O_DIRECT
#device/dev-io.c:134         /dev/sdb1: block size is 512 bytes
#device/dev-io.c:483         Closed /dev/sdb1
#filters/filter-md.c:39         /dev/sdb1: Skipping md component device
#filters/filter-sysfs.c:251         /dev/fd0h360: Skipping (sysfs)
#filters/filter-sysfs.c:251         /dev/fd0h720: Skipping (sysfs)
#filters/filter-sysfs.c:251         /dev/fd0u1440: Skipping (sysfs)
#filters/filter-sysfs.c:251         /dev/fd0u2880: Skipping (sysfs)
#device/dev-io.c:437         Opened /dev/sdc RO
#device/dev-io.c:264       /dev/sdc: size is 2734359936 sectors
#device/dev-io.c:134         /dev/sdc: block size is 4096 bytes
#filters/filter.c:112         /dev/sdc: Skipping: Partition table  
signature found
#device/dev-io.c:483         Closed /dev/sdc
#device/dev-io.c:437         Opened /dev/sdc1 RO
#device/dev-io.c:264       /dev/sdc1: size is 1367195697 sectors
#device/dev-io.c:483         Closed /dev/sdc1
#device/dev-io.c:264       /dev/sdc1: size is 1367195697 sectors
#device/dev-io.c:437         Opened /dev/sdc1 RO O_DIRECT
#device/dev-io.c:134         /dev/sdc1: block size is 512 bytes
#device/dev-io.c:483         Closed /dev/sdc1
#filters/filter-md.c:39         /dev/sdc1: Skipping md component device
#device/dev-io.c:437         Opened /dev/sdc2 RO
#device/dev-io.c:264       /dev/sdc2: size is 1367163630 sectors
#device/dev-io.c:483         Closed /dev/sdc2
#device/dev-io.c:264       /dev/sdc2: size is 1367163630 sectors
#device/dev-io.c:437         Opened /dev/sdc2 RO O_DIRECT
#device/dev-io.c:134         /dev/sdc2: block size is 512 bytes
#device/dev-io.c:483         Closed /dev/sdc2
#filters/filter-composite.c:31         Using /dev/sdc2
#device/dev-io.c:437         Opened /dev/sdc2 RO O_DIRECT
#device/dev-io.c:134         /dev/sdc2: block size is 512 bytes
#label/label.c:180       /dev/sdc2: No label detected
#label/label.c:278         <backtrace>
#device/dev-io.c:483         Closed /dev/sdc2