User`s guide

Chapter 2: Overview 7
Mixing Wide and Narrow Drives on the Same SCSI Bus
You can mix the DigiDrive and other wide and
narrow drives. This allows you to continue us-
ing existing narrow drives as you expand your
system’s storage capability. When mixing wide
drives and narrow drives on the same SCSI bus,
remember the following:
◆ You must place the wide drives physically on
the SCSI bus before the narrow drives (see
Figure 3).
◆ Always use a 68-pin to 68-pin cable and a
wide-to-narrow terminating adapter (68-pin to
50-pin) for the connection between the last
wide drive and the first narrow drive (see
Figure 3). The adapter terminates unused data
lines in the cable to ensure data integrity on the
SCSI bus.
◆ PCI-based SCSI buses that contain a mixture
of wide and narrow DigiDrives can have up to
eight drives on the SCSI bus.
Figure 3. Mixed Drive Layout
5
l
o
6
l
o
4
3
68
-
pin to 68
-
pin cable
68
-
pin to 50
-
pin adapter
Wide drives
Narrow drives
To computer’s
50
-
pin to 50
-
pin cable
DigiDrive
50
-
pin terminator
enclosures
SCSI host bus adapter