how to boot from second disk

[mcclnx mcc]

We have Redhat As 4.3 on DELL 6800 server.  I am doing recovery test and tried to boot from second disk (which use dump to sync first disk).  My procedure are:

1. "mkbootdisk" to create bootable CD

2. reboot server and go CTL-M on PERC 4e/dc firmware menu.  Change boot device to "2"

3. put bootable CD to CD-ROM.  Reboot

4. it still boot from first disk instead of second disk.

any one know how to boot from second disk or command "boot:  xxxx" to second disk?


Thanks.


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