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DEU Subsystem Installations
Setup
This section contains the procedures to install and
configure the Ultra Extender and Differential
Converter Option cards in your DEU disk array
subsystems.
The installation is essentially a three step process: the
cards are installed in the DEU subsystem, the cabling
is completed based on the supported configuration, and
the array is then configured.
Several rules will apply when cabling and configuring
multiple cabinets in a “master/slave” environment.
The DEU subsystem supports one “master”
subsystem and up to two “slave” subsystems
interconnected.
No more than two Option cards can be installed on
one SCSI bus (master/ slave environment).
When DEU’s are operated in split bus mode (dual-
bus module installed), all drives on one channel
from one cabinet must be connected to the same
channel on the other cabinet. Channel 0 drives
cannot be connected to Channel 1 drives in any
configuration nor can the reverse condition exist.
When implementing an Ultra Wide SCSI
configuration, cable lengths are limited to one (1)
meter from the Ultra Extender card to the next
cabinet.
Single channel cards must be installed in the DEU
upper or right side Option card slots.