U have to do both on OS and TSM .

For OS u have to go to IBM WEB SITE and u will see tons of info on that.
As per TSM it also has parameters ex: window size etc. in implementation of
Tivoli REDBOOKS ON IBM SITE.

For tape drives u got to look at their respective sites.
PL use compressed mode on clients for better n/w xfer rate
and keep tcp/ip speed at 100mbs /sec .Configure I/f accordingly.

Keep patches on OS sever and clients up to date to avoid memory leaks.

Its a very long info u need to do lot of home work and go to respective web
sites.\

It took me one month to do the same on HP/AIX/SUN/NT/TSM.

BALANAND PINNI.
PHONE 314-206-5911.
EM:bp3965 AT momail.sbc DOT com.
PG:1-800-451-6897.