Looking for disk I/O test for ASM?

We are running oracle 10.2.0.3 on RHEL4 itanium 64 bit and we are using ASM for out database storage. IN our production environemnt the disk subsystem is an EMC clarion array but in our test environment our disk subsystem is an HP MSA storage.
I am looking for a good way to test the disk I/O throughput between the 2 storage arrays when the disks are configured as oracle ASM disks?
Can ayone make any suggestions on this testing.
Thx.

Perhaps not understanding your question, but we run 10g2 on Linux RHEL with ASM on SAN and use iostat to monitor IO performance.
We implement multipathing and so run /sbin/multipath -l to discover the names of the devices and then run iostat like so:
iostat -x dm-0 dm-1 15
which will print stats every 15 seconds for the 2 named devices dm-0 and dm-1
HTH,
Peter

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