If u really need help you must be courteous enough to answer the questions asked and not ignore it. That will enable us to get a solution to your problem. I hope u understand.

Here are some more...

1. How long has the database been up? (from v$session).
2. Of the 4 disks (f0, s0, s1, s6), f0 & s6 seem to be relatively free from access? Any reason why?


Check Article 62161.1 on metalink for the waits on data blocks.

HTH.