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Table 19-1
Types of maintenance for fan unit
Configuration Active/hot Active/cold Inactive/hot Inactive/cold System stopped
Build in g block confi g u rat io n
Supported Unsupported
(*1)
Supported Unsupported
(*1)
Supported (*2)
*1: If any physical partition is currently operating, the crossbar box cannot be powered off.
*2: All the physical partitions must be powered off, and the system must be completely shut down.
Table 19-2
Maintenance flow
Details of update process Replacement
1 Preparation 19.3
2 Removing a fan unit 19.4
3 Installingafanunit 19.5
4 Restoring the system 19.6
19.2.1 Types of maintenance
Table 19-1 lists the types of maintenance for the fan units. For the definition of
maintenance, see "4.3 Understanding Types of Maintenance."
19.2.2 Maintenance flow
Table 19-2 lists the sequence of the maintenance procedure for the fan units.
19.2.3 Precautions for replacement
Note the following points when replacing a fan unit:
■
When replacing multiple fan units, replace one unit at a time. If a redundant
configuration cannot be assured, perform cold replacement.
■
The cooling fans have a redundant configuration. Thus, the system can continue
operating even if one of the fans in the fan units experiences a failure. Avoid
operating the system with a faulty fan for an extended period and replace the fan
unit containing the failed fan as soon as possible.
19.3 Enabling the Removal of a Fan Unit
This section describes the preparations that must be completed prior to removing a
Chapter 19 Maintaining the Fan Units of the Crossbar Box 329