Migration Guide Migration from Qlogic Failover/Emulex Multipulse to HP Device Mapper Multipath (AA-RWFCC-TE, March 2008)

3 Recovering from migration
Failure
If the Migration proc ess exi ts abruptly, you must perform manual migration steps to get back to get the
pre-migration configuration.
Refer the Log file saved at: /var/Migration/log/log<date> to find the unmounted file system,
deactivated volume group.
1. If HPDM Multipath tools is installed, execute below steps otherwise go to Step 2
Unmount the mount points mounted using multipath devices
#umount <mount point>
Remove the multipath device maps.
# multipath –F
Identify the installed HPDM Multipath vers ion.
# rpm –qa | grep HPDMmultipath-tools
Remove the HPDMmultipath-tools.
# rpm -e HPDMmultipath-tools<HPDM Version>–<OS Version>
2. Restore the Volume Groups
Restore the Volume Groups metadata.
# vgcfgrestore –a
Import the Exported Volume Groups.
# vgimport –a <Volume Group name>
Activate the D eactivated Volume Groups
# vgactivate –a y <Volume Group name>
3. RestoretheMountpoints
Restore the backup /etc/fstab file.
# cp /var/Migration/fstab.bkup /etc/fstab
# mount –a
Migration from Qlogic Failover/Emulex Multipulse to HP Device Mapper Multipath
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