Storage migration from vendor to vendor

Hello all,

The old annoying question comes back again. Due to decisions out of the
hands of the technical people I am facing the need to migrate san
storage from one storage vendor (STK) to another (EMC or Netapp or even
something else)

The question here is whether you are familiar with some technique or
product that can assist in "copying" LUNs from one vendor to the other
additionally with the limitation of not having the possibility to use
fiber channel or having both storage boxes in the same fabric (in which
case the migration could be done using volume management tools through
the operating system). In other words it would be most preferrable to
do the operation

Any thoughts and ideas will be highly appreciated


--