Silicon Graphics 1200, User Manual

Page: 23 / 62

Theory of Operations
007-4248-001 9
• The floppy controller on the motherboard connects to the floppy drive.
• The IDE controller on the motherboard connects to the CD-ROM drive.
• The Ultra-2 SCSI controller on the optional PCI-based RAID controller connects to
the midplane providing hot-swap RAID capability for four or five hard drives.
Figure 2-4 shows cabling routes without the optional PCI-based RAID controller:
• Wide Ultra2 LVD SCSI capability on the motherboard connects to the midplane
providing high performance disk I/O for hard drives for customers who do not
require hot-swap capability with data redundancy.
External connections are not shown. All configurations support an optional Ultra SCSI
connector for external SCSI devices. See Figure 2-11 for the location of this connector on
the back panel and Table 4-1 for additional information.
Figure 2-3
SCSI Cabling Route to Midplane with Optional RAID Controller
Optional RAID
controller
Midplane
Floppy drive
CD-ROM drive