DEC DS-HSZ22-AA, Руководство пользователя

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EK–SMCPO–UG. A01 5–1
5
Second Controller Option
This chapter describes how to install a second RAID controller in the pedestal. The sec-
ond controller provides a fail/safe feature to protect your data in case of a primary con-
troller malfunction. The redundant controller is installed directly below the primary (top)
controller.
5.1 Introduction
The controller option provides a second (redundant) controller unit in your sub-
system installation to preserve the integrity of data should the first controller
sustain a malfunction. The second controller is installed directly below the exist-
ing device in the bottom controller slot of the pedestal (see Figure 5–1).
The installation procedure consists of adding two SIMM memory modules to the
redundant controller and one memory module to the existing controller in the
pedestal. Following the memory upgrade, you simply insert and seat the devices
in their respective controller slots and configure the subsystem to accommodate a
redundant controller. The following steps summarize the option installation pro-
cedure:
•
Ensure the SCSI bus is quiescent prior to powering off the host, the pedestal,
and the UPS
•
Install two of the SIMM modules supplied with the kit into the second con-
troller (all SIMMs must have the same memory capacity)
•
Install the third SIMM module supplied with the kit into the existing control-
ler
•
Install the controllers into their appropriate slots in the pedestal
•
Power up the subsystem and configure the second controller for redundant
controller operation