Determining what is causing high wio%

I have an E5000s (6 cpu/1.0 Gb ram) running Oracle Financials 10.6.1 (about 7-8 development databases) Oracle RDBMS 7.1.6.2, Solstice Backup 4.2.2 (Networker), and Patrol agent.

This particular machine has 3 IO cards attached to it. Cards 1 and 3 are each connected to 1 RSM214 storage array, each on channel b. IO card #5 is connected to 2 additional storage arrays for fail over on channels a and b.

I have noted a high percentage of wio on the system anywhere from 70-80%. I first thought it was the DLT tape device connected through Solstice Backup, so I turned Networker off to see if this solved my problem. Still, high wio%. I next turned off Patrol, still high wio%. Next, I am going to shut down all of the financials databases and their associated processes.

What is a good solution to determine what is causing high wio%?

-- 
Neil Greene
Senior System Engineer / Oracle DBA		"Tyra, you left your toobrush
MCI Systemhouse, Inc. 				at my house last night."
email: ngreene_at_laoc.SHL.com