You must use the correct HBA device driver and firmware levels for the Apple hosts that are running on the Mac OS X server v10.5.x operating system.
The following IBM® Web site provides current interoperability information about supported device driver and firmware levels:
www.ibm.com/storage/support/2145
For more information on ATTO HBA, device driver, and firmware downloads, select Obtain Drivers from the following Web site:
http://attotech.com/solutions/ibm.html
After logging in to the support pages, select Celerity xxx for IBM SAN Volume Controller, where xxx is your HBA type.