Hi,
I had a question regarding ASM. We have 11.1.0.7 RAC databases runninig on ASM on RHEL5. The ASM disks are presented via an 3Par SAN. Now my understanding is that rebalance moves the hot blocks in ASM to another LUN. But in our case we are seeing that 1 LUN is significantly busier than the other in the same DG. This is even true for write operations. Now is there a way to reduce hot blocks / spread block within the DG? I understand that we can be tuning the sql in question, but since our is a muti-tenant env, its not about one or more sqls. Thats why I looking for some way of altering data placement within the DG.

Other info:
ASM Redundancy: External
Striping: Coarse
AU Size : 1mb

TIA