iostat e.g. if your LUNs in v$asm_disk.path are /dev/sda /dev/sdb ... you can use iostat -x sda sdb ... The OS does not know if LUNs are in ASM or not so you monitor them the same way. On Sat, Apr 18, 2009 at 1:01 AM, Orlando L <oralrnr@xxxxxxxxx> wrote: > How do I monitor I/O with ASM. I need ways to find out IO to the devices, > any bottle neck device, the read/write rates etc -- Regards, Greg Rahn http://structureddata.org -- //www.freelists.org/webpage/oracle-l