Finish The Ibm Totalstorage Ds4000 Fc2-133 Host Bus Adapter Bios; Setup - IBM TotalStorage DS300 Best Practices Manual

Figure 9-147 Multipath disk device properties
9.2.9 Finish the IBM TotalStorage DS4000 FC2-133 Host Bus Adapter
BIOS setup
During the initial setup of the host bus adapter, only one boot device was defined.
To insure that the system boot can take place no matter which controller owns
the array of the boot logical drive, the alternate controller must be defined as a
boot target. The appropriate LUN must be selected as well. This settings needs
to be defined also for the second host bus adapter to allow booting the system in
case the first HBA fails. This will not be the case under all circumstances. There
is no failover driver available, so it depends on the kind of problem if the system
can use the second host bus adapter to boot from.
1. Reboot the system. During POST press CTRL+Q when the adapter displays
the message "Press <CTRL+Q> for Fast!UTIL" to enter the host bus adapter
BIOS setup.
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IBM TotalStorage DS300 and DS400 Best Practices Guide