User`s guide

Optional Devices
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Optional IO9 PCI Card
If you do not wish to use the IO10 base I/O card in your system, an optional IO9 PCI card
is required for base I/O functionality. Each system must contain at least one base I/O PCI
card for base I/O functionality within the system. This PCI card must reside in bus 1, slot
1 (the bottom slot) of the lowest base compute module in the system. The IO9 PCI card
has the following connectors:
• External VHDCI 68-pin SCSI connector
• 10/100/1000BaseT Ethernet connector
• Real-time interrupt output (RTO) and real-time interrupt input (RTI) connectors
Note: The RT interrupt input and RT interrupt output functionality of the IO9 PCI
card is not supported under SGI Linux + ProPack.
The optional IO9 card also contains an IOC-4 ASIC that supports the following features:
• One IDE channel for the DVD-ROM
• NVRAM and time-of-day clock
Optional Tape Devices
The Silicon Graphics Prism supports optional or third-party tape drives. For current tape
solutions for your system visit:
http://sales.corp.sgi.com/products/storage/tape.html
or check with your SGI sales or service representative.