System Cabling A-3
Standard Configuration
Your system is cabled using a dual channel on-board IDE Controller and dual on-board
Symbios Logic SYM53C875 SCSI Controllers.
The on-board IDE controller supports the standard internally mounted CD-ROM as its
first (master) device and an optional internally mounted IDE tape drive as its second
(slave) device.
The SYM53C875 contains two independent SCSI controllers that share a single PCI
bus master interface. Internally, each controller is identical, capable of operations using
either 8- or 16-bit SCSI providing 10 MB/s (Fast-10) or 20 MB/s (Fast-20) throughput,
or 20 MB/s (Ultra) or 40 MB/s (Ultra-wide) throughput. As implemented on the system
board controller A attaches to an Ultra-2 SCSI backplane that supports up to seven
Ultra-2 SCA drives. Controller B may be used to support SCSI devices in the
removable media bays.
A 3.5-inch diskette drive is also installed in all systems and interfaces separately to the
system board.
Referring to the Figure below, a 68-pin wide SCSI interface cable (D) is connected to
the SCSI connector (E) in the lower middle of the system board. This cable connects to
the rear of the hard disk drive's SCSI backplane (C).
The IDE interface cable (J) is connected to the IDE connector (I) towards the right edge
of the system board. This cable connects to the rear of the internally mounted CD-ROM
drive (K).
Optional internally mounted SCSI removable media devices (P) may be connected to
the SCSI controller connector (N) or optional internally mounted IDE removable media
devices (M) may be connected to the secondary IDE controller connector (L).
When adding or removing IDE devices, consider the following:
Note: Only one IDE cable is supplied with the system.
! The system board supports a primary and secondary IDE channel connector. Each of
these supports two devices, for a total of four IDE devices.
! A first (master) device and a second (slave) device are supported on both the primary
and secondary IDE channel connector.
! The device configuration, master versus slave, is determined by jumpers on the
devices. Cable Sense (CS) device configuration is not supported.
! If only one device is on a channel connector it must be set as the master device.