The Logical Volume Manager (LVM) in AIX is incapable of switching between multiple paths that may exist to the boot disk. If the path that LVM selects becomes unavailable at boot time, the root file system is disabled, and the boot fails. DMP can be configured to overcome this problem by ensuring that an alternate path is available at boot time.

Support for LVM bootability over DMP is enabled by running the following command:

# /usr/sbin/vxdmpadm native enable vgname=rootvg

Individual DMP nodes or subpaths can be added or removed from the rootvg. The following command needs to be executed after adding or removing the DMP node or subpaths:

# /usr/sbin/vxdmpadm native enable vgname=rootvg

Support for LVM bootability over DMP is disabled by running the following command:

# /usr/sbin/vxdmpadm native disable vgname=rootvg

LVM bootability over DMP can be verified as being enabled on a system using the following command:

# /usr/sbin/vxdmpadm native list vgname=rootvg

See the vxdmpadm(1M) manual page.