Migrate MPXIO devices to DMP without loosing data?

[GeorgeC]

Solaris 10 U8, Sf 5.0mp3

I have a solaris machine that has MPXIO enabled and all of the vxvm volumes were built using MPXIO devices. File system have already been created and they contain data.

Can anyone tell me if it is possible to disable Solaris MPXIO and use Veritas DMP without having to do a wreck and rebuild of all of my filesystems?

[Gaurav_S]

what doesn your vxdisk list output DA names have ? are they vxvm names or mpxio names ?

can you paste a sample

# vxdisk list

# vxdisk list <device>

also highlight if disk names are mpxio based or DMP pcked names..

G

[Marianne]

You might want to check with Support if the following can be done using 5.0MP3...

Extract from 5.1SP1 DMP Guide:

Migrating to DMP from Sun Multipath IO (MPxIO)
This procedure describes removing devices from MPxIO control and enabling DMP on the devices.
Plan for system downtime for the following procedure.
The migration steps involve system downtime on a host due to the following:
■ Need to stop applications
■ Need to stop the VCS services if using VCS
■ The procedure involves one or more host reboots,

To take devices out of MPxIO control and enable DMP on the devices

1 Stop the applications that use MPxIO devices.
2 Unmount all the file systems that use MPxIO devices.
3 Deactivate the ZFS pools operating on MPxIO devices.
4 Turn on the DMP support for the ZFS pools.
# vxdmpadm settune dmp_native_support=on
5 Disable MPxIO using the following command.
# stmsboot -d
6 Reboot the system.
7 After the reboot, DMP controls the ZFS pools. Any ZFS pools are migrated onto DMP devices.
8 Mount the file systems.
9 Restart the applications.