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

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.

vxvmconvert tries to unmount mounted file systems during the conversion. Bear

in mind though, that vxvmconvert makes no attempt to close down running

applications on those file systems, nor does it attempt to deal with applications

(e.g., databases) running on raw LVM volumes. More information is available on

vxvmconvert.

See “Conversion and reboot” on page 31.

Note: It is strongly recommended that you do not rely on vxvmconvert's

mechanisms for unmounting file systems. Conversion will be simpler if you close

applications, and unmount file systems before running vxvmconvert.

Converting LVM to VxVM

Converting LVM volume groups to VxVM disk groups