Technical data

CHALLENGE/Onyx Diagnostic Road Map 1-5
Figure 1-3 shows a block diagram of the system buses
Peripheral buses SCSI buses Connect a variety of storage devices to
the IO4 board. The IO4 board has two
built-in SCSI buses. By adding
additional IO4 boards and SCSI
mezzanine cards an Everest system can
support up to 32 SCSI buses
(depending upon the specific system
configuration).
Flat cable interface (FCI) Connects the graphics cards or
VMEbus to the IO4 board. Like the
SCSI, multiple FCI buses can be
supported by adding FCI mezzanine
cards. In the standard configuration, 2
FCIs are on the IO4 board.
VMEbus Embedded in both the deskside and
rackmount backplanes; available as an
optional third cardcage (CC3) with the
rackmount system.
Table 1-1 (continued) Bus Types in Everest Deskside and Rackmount Systems
Bus Category Bus Types Description