Scsi Cabling And Configuration - Sun Microsystems Ultra 2 Series Reference Manual

1.7.2

SCSI Cabling and Configuration

When mixing 8-bit and 16-bit SCSI devices on the same physical SCSI bus, follow
these cabling and configuration guidelines to insure proper device addressing and
operation:
If all external mass storage devices use 68-pin connectors, connect all non-Sun
devices to the Ultra 2 Series system first and follow them with Sun devices. Sun
devices use autotermination.
If external mass storage devices consist of 68-pin Sun devices and 50-pin devices,
connect the Sun 68-pin devices to the Ultra 2 Series system first and terminate the
daisy chain with the 50-pin device and its terminator.
See the following figure for a summary of cabling and configuration guidelines.
Ultra 2
series
Ultra 2
series
FIGURE 1-8
1-10 Sun Ultra 2 Series Reference Manual • May 1996
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Non-Sun
device
68—68
68—68
Non-Sun
device
68—68
68—68
Connecting External Mass Storage Devices
Sun Sun
device device
68—68
Sun 50-pin
device device
68—50
Terminator
Adapter cable
T