Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

■ Scripts run by cron(1M).
■ Other administrative scripts.
Workaround
vxvmconvert records a mapping between the names of the LVM device nodes and
VxVM device nodes. This data can be used to create symbolic links from the old
LVM volume to the new VxVM device names. The mapping is recorded in the file:
/etc/vx/reconfig.d/vgrecords/vol_grp_name/vol_grp_name.trans
This file provides information on how to proceed further to link the old LVM
volume names to the new VxVM device names.
Warning: This method of resolving the naming problem has risks. The symbolic
links can become stale. For example, if a database refers to /dev/vx/rdsk/vol1
through a symbolic link /dev/vg00/rvol1(“the old LVM name”), and if the
underlying VxVM volume configuration is changed in any way, the database could
refer to a missing or different volume.
Note: You may want to use this symbolic link approach to ease the transition to
VxVM. You can set up the symbolic links after the successful conversion to VxVM.
Then, you can do the investigation on a case by case basis for each volume. When
you are satisfied that there are no problems introduced by the name change, the
symbolic link to that volume can be removed. You must be careful to maintain a
static VxVM volume configuration during this transition period.
Over time, the ultimate goal should be that the underlying VxVM naming is used
by all applications, and that there are no indirect references to those volumes.
Stopping application access to volumes in the volume group
to be converted
No applications can be active on the LVM volume group undergoing conversion.
Before attempting to convert any volume group, you must ensure that applications
using that group are down. This involves stopping databases, unmounting file
systems, etc.
Note: If you are converting a volume with swap space on it, the conversion requires
a reboot. The swap space cannot be taken out of control of the operating system
with a shutdown to single user mode.
Offline data migration
Converting LVM to VxVM
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