Veritas Volume Manager 5.0.1 Migration Guide, HP-UX 11i v3, First Edition, November 2009

Thevxvmconvertcommand does not convert any volume group that contains
a rootable volume, identified by the presence of the LIF area as created by
mkboot(1M). Not only is the current root volume off limits, but any volume
that might be used as an alternate root volume is rejected as well.
Note: VxVM rootability operations and rootability commands are currently
not supported on the LVM version 2 volume groups.
Rootability operations involving LVM version 1 root disks like creating VM
root image from LVM root disk, restoring the LVM root image from VM root,
destroying the LVM root disk, continue to be supported as before.
Note: You can use the vxcp_lvmroot(1M) command to create a VxVM root disk
on a spare physical disk from the contents of the existing LVM root disk.
Similarly, you can use the vxres_lvmroot(1M) command to recreate an LVM
root disk on a spare disk from the contents of the VxVM root disk. Additional
information is available on the VxVM root disk.
See the Veritas Volume Manager Administrator’s Guide.
■ A volume group containing mirrors using the Mirror Write Cache feature for
volume consistency recovery.
Users should be aware that when converting mirrored LVM volumes to VxVM,
some of these volumes will likely have the Mirror Write Cache consistency
recovery method in force on the volume. The vxvmconvert utility can convert
these volumes, but must use the Dirty Region Logging (DRL) feature to obtain
the same level of functionality. However, since Dirty Region Logging requires
some user space to be available for the log, a conversion could fail due to an
MWC volume being full, leaving no space for the DRL log. However it is very
unlikely that this situation would occur. Note that the MWC and DRL are used
only when the system crashes or is improperly shut down, to quickly bring all
mirrors in the volume back into a consistent state.
■ A volume group containing the /usr file system.
For this release, a volume group containing the /usr file system cannot be
converted because vxvmconvert needs access to files in /usr.
■ Volume groups with any dump or primary swap volumes.
Because this release does not support rootability, vxvmconvert will not convert
any volume group with dump or primary swap volumes. These are volumes
known to the boot process. However, swap volumes on volumes other than the
23Converting LVM to VxVM
Converting LVM volume groups to VxVM disk groups