I have a Solaris 10 system using SAN disk from an external unit. The
SAN disk is configured as a Solaris Volume Manager concat metadevice
and hosts various soft partitions. I need to migrate everything on the
current SAN disk to new SAN disk on a different external unit, and
then retire the old SAN unit.

For the migration, I would like to mirror the current metadevice to
the new disk. Mirroring should hopefully reduce downtime and help
ensure the accuracy of the data migration. However, I haven't found
any documentation on how to do this.

I was wondering, if my current metadevice is named d90, can I create a
new mirror named d95 that includes d90 as a submirror (e.g. metainit
d95 -m d90) without damaging d90, and while d90 is live? If so, then I
could attach the new metadevice to d95, and be on my merry way. If
not, is there another way?

One alternative is, of course, to shut everything down and copy the
data over manually, but I'd like to avoid that if possible.

Thanks,
Pete