Table10-1 Typesof ma intenance for the power supply unit
Configuration Active/hot Active/cold Inactive/hot Inactive/cold(*1) Systemstopped
Single-chassis configuration
Supported Unsupported Supported Supported Supported
Building block configuration
Supported(*2) Supported(*3) Supported Supported Supported
*1: Fora single-chassis configuratio n,t hein active/cold maintenance procedure is the same as that for stopping the system, therefore see
theprocedure for system-stoppe d maintenance.
*2: Active/hotreplacement can be perform ed only with a redundant configuration.
*3: Itis necessary to use dynamic r econfiguration (DR) to disconnect a chassis requiring maintenan ce from the physical partition.
Table10-2 Maintenanceflow
Detailsof update process Replacement
1 Preparation 10.3
2 Removinga power supply unit 10.4
3 Installinga power supply unit 10.5
4 Restoringthe system 10.6
definitionof maintenance, see "4.3 UnderstandingTypes of Maintenance."
10.2.2 Maintenance flow
Table10-2 lists the sequence of the maintenance procedure for the power supply
units.
10.2.3 P recautions for replacement
Notethe foll owing points when replacing a power supply unit:
■There are two power supply units. Thus, the system can continue operating even
ifo ne of the units fails. Do not, however, operate the system for an extended
periodw hile one unit has failed.
■When replacing multiple power supply units, replace one unit at a time. If
redundancyof the power supply unit cannot be assured, then system-stopped
maintenance must be performed.
■Donot force push the power supply unit into its slot. Using excessive force may
damagethe component or the chassis.
Chapter10 MaintainingthePo wer Supply Units 193