Table22-1 Typesof maintenance for fan backplane
Configuration Active/hot Active/cold Inactive/hot Inactive/cold Systemstopped
Building block configuration
Unsupported Unsupported
(*1)
Unsupported Unsupported
(*1)
Supported(*2)
*1: Ifany physical partition is currently operating ,the cr ossbar box cannot be powered off.
*2: Allof the physical partitions mu st be stopped, and the system must be completely shut down.
Table22-2 Maintenanceflow
Detailsof update process Replacement
1 Preparation 22.3
2 Removingthe fan backplane 22.4
3 Installingthe fan backplane 22.5
4 Restoringthe system 22.6
Caution- Tocompletely shut down the system, all the power cords must be
removed. If the power cords are not removed, an electrical failure may occur.

22.2.1 T ypes of maintenance

Table22-1 lists the types of maintenancefor the fan backplane. For the definition of
maintenance,see "4.3 UnderstandingTypes of Maintenance."

22.2.2 Maintenance flow

Table22-2 lists the sequence of the mai ntenance procedure for the fan backplane.
22.3 Enabling the Removal of the FanBackplane
Thissectio n describes the preparations that must be completed prior to removing the
fan backplane.
1. Open the rack door.
2. LogintotheXSCFshell.
3. Executethe showlogs command to identify the component requiring
Chapter22 Maintainingthe Fan Backplane of the Crossbar Box 359