Red Hat Knowledgebase

The following information has been provided by Red Hat, but is outside the scope of our posted Service Level Agreements (https://www.redhat.com/support/service/sla/) and support procedures. The information is provided as-is and any configuration settings or installed applications made from the information in this article could make your Operating System unsupported by Red Hat Support Services. The intent of this article is to provide you with information to accomplish your system needs. Use the information in this article at your own risk.

Release found: Red Hat Enterprise Linux 4

Resolution:
Converting a Volume Group from LVM2 to LVM1 would be necessary if there is a need to use a VG created with Red Hat Enterprise Linux 4 in Red Hat Enterprise Linux 3 as the latter one only supports LVM1.

The metadata format of a volume group can be changed from LVM2 to LVM1 by using LVM tools shipped with Red Hat Enterprise Linux 4. Before attempting a conversion, make sure to back up any important data and that the latest available version of LVM2 tools is being used. To convert the format, run the following command:

vgconvert -M1 

See the man page of vgconvert for more information and additional options.

$ man vgconvert