Hi Shiva, ioscan is your friend. Make sure to read and understand the man page for it first! You may be able to look for fibre channel HBAs by looking for "fc". At least our system shows: fc 0 0/3/0/0 td CLAIMED INTERFACE HP Tachyon XL2 Fibre Channel Mass Storage Adapter /dev/td0 Of course, your system is most likely different. HTH! GL! Rich ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Shivaswamy Raghunath Sent: Sunday, November 19, 2006 9:45 PM To: oracle-l@xxxxxxxxxxxxx Subject: HBAs Hello. On my server (HP Unix) I am interested list out the installed HBAs. Can you tell me how can I find it? Thanks, Shiva