FAStT200 HA performance tuning

All

I have a few questions regarding tuning the IBM FAStT200 HA storage arrays.
Incidentally our configuration is 2-node MSCS Windows 2000 MSCS clusters
running as file servers. File sizes range all the way from 1K to 100M. And
its all on one RAID5 array with 3 LUNs. 2 of these are 1GB and the remainder
is one large NTFS volume.

I am not allowed to change RAID levels as the free space will reduce and
the customer wont like it. :-(

1. Does anyone have any details of the max throughput that can be achieved
for both read and write (real-world figures)? We have pretty much a 50-50
split between reads and writes.
2. Does anyone defrag FAStT200 HA out there?
3. Do I have to use both controllers in the HA model to get the full throughput
possible. Can I not make one controller run at the fastest possible rate?
I assume FC-AL 1Gbps ~ 100MB/s. I'd be happy with 80MB/s if I can get it ;-)

and a slightly OT question ;-)

4. Is it possible to make the disks on the FAStT200 appear as JBOD to a Solaris10
x86 host and use ZFS?

Thanks

M@