There are various factors to consider (remapping, reformatting
of disk drives, partitioning) when replacing existing storage.
When you are replacing existing storage, partition the storage so that
its virtual disks are similar in configuration to the disk drives that they
are replacing. New configurations must be large enough to accommodate the
existing data.
Note: You might want to take advantage of this opportunity
to do some remapping. The allocation and distribution of data does not have
to be a straight one-to-one relationship, although that is possible. For instance,
you can take advantage of using a maximum of 64 logical subsystems whereas the prior limitation
was 32 logical subsystems.