This chapter describes how to configure the system's Firmware to use the hardware properly. To do this we are going to use a software tool from IBM called System Management Services, SMS.
Lots of Linux users are familiar with the x86 platform, and immidiatly ask "What key may I press to access the BIOS". Well, on the 7248-133 it's not that easy, but it's not very difficult either. For hardware system management IBM has a software program to be booted from floppy disk, called "SMS" - "System Management Services". You can get floppy images and MS-DOS programs for creating those here. You might also want to upgrade your Open Firmware. Check the README files on the link about this.
To boot the SMS, turn off the machine, insert the SMS floppy, push the power button and press the F2 key while the system check icons pop up in the bottom of the screen. (If you prefer a text based interface, try F4 instead.) Basic usage is outside the scope of this document, but it's not very difficult.
You should have a little look over your system to see whats actually there. Then you should check the boot sequence, as it's quite important to make your system boot right. The sequence should be: (You guessed it) Floppy disk -> CD-player -> first SCSI harddisk -> second SCSI harddisk -> etc.
You might find good references in IBM's salesmanual for our model.
There are also some reference manuals in pdf format for free download from the IBM RS/6000 pages that might come handy.