We are running TSM 4.2.2.0 on OS390/2.10 and we are in the process of
replacing our mod 3 dasd with mod 9's.

Currently I have a disk storagepool with a mixture of mod 3 and mod 9 dasd
volumes, however when I define my dasd storage pool volumes I sized  them
as mod 3.
 I also have my database volumes broken in to mod 3 size volumes if they
reside  on a mod 9.

My question is will I see a performance issue if I resize all of my storage
pool volumes  and database volumes to a full mod 9 in size?