I had the memory_target parameters set, and had the old values (sga, etc) set as well so they were the minimums. Still had the issue.

Async IO is not enabled at the OS level. So, setting disk_async_io to true may be a bad idea.

Thanks for the suggestions, though.

We have 11g databases on HP-UX Itanium that don't have this problem. I'm beginning to think that it may be a RISC issue...

Any other ideas?

Thanks!
Jodie