DEU Subsystem Installations
Set u p
his section contains the procedures to install and configure the Ultra Extender and Differential Converter Option cards in your DEU disk array subsystems.
he 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
Tone 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
Tcabinet.
Single channel cards must be installed in the DEU upper or right side Option card slots.
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