mirroring across ssa adapters?

We're trying to reduce the current window required to
read backups from the network and write to the TSM
storage pool. One idea presented and asked is if it
is possible to put two ssa adapters in the tsm server
with lots of disk on the ssa trays, then tell lvm to
create the lv such that the PPs are mirrored across the
ssa adapters. Or if not mirroring the actuall PPs,
then mirror the entire lv across the ssa adapters.

(i.e. Though the PPs would be mirrored on separate,
physical hdisks, I am asking about forcing the
mirrored PPs to be on separate adapters. Separate
adapters would be faster, yes?)

Mike