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Chapter 1: Introducing the Challenge Deskside Servers
• A 25-pin parallel port
• An independent system status monitor (System Controller) that records
error information during any unplanned shutdown
Available options include:
• VMEbus I/O and controller boards
• Additional half-height and full-height SCSI devices
• External 1/2-inch and 8 mm SCSI-controlled tape backup systems
• A system console ASCII terminal
• CPU and memory upgrades
• Additional IO4 controller boards
• A visualization console option providing a basic color graphics
interface to the POWER Challenge system
• Optional IO4 mezzanine daughter boards (also known as HIO
modules) for expanded and varied functionality of the IO4
Although the Challenge deskside servers are similar in size and external
appearance to previous Silicon Graphics deskside systems, most internal
features are different in design.
The internal drive rack supports up to seven half-height (or one half-height
and three full-height) devices that are controlled by either one or two SCSI-2
buses.
The Challenge Board Set
The basic Challenge board set consists of
• an IP19 or IP21 CPU board
• an MC3 memory board (also known as a POWERpath-2 interleaved
memory board)
• an IO4 controller board