Shutting Down A Controller Module - R/Evolution 2000 Series Troubleshooting Manual

Shutting Down a Controller Module

Shut down a controller module before you remove it from an enclosure, or before
you power off its enclosure for maintenance, repair, or a move. Shutting down a
controller module halts I/O to that module, ensures that any data in the write cache
is written to disk, and initiates failover to the partner controller, if it is active.
Caution –
capability for the storage system and host applications do not have access to its
volumes. If you want the system to remain available, before shutting down one
controller verify that the other controller is active.
To shut down a controller module:
1. Select Manage > Restart System > Shut Down/Restart.
2. In the Shut Down panel, select a controller option.
3. Click Shut Down.
A warning might appear that data access redundancy will be lost until the selected
controller is restarted. This is an informational message that requires no action.
4. Confirm the operation by clicking OK.
Note –
following event is recorded in the Windows event log: Initiator failed to connect to
the target.
84 R/Evolution 2000 Series Troubleshooting Guide • May 2008
While both controllers are shut down, you have limited management
If the storage system is connected to a Microsoft Windows host, the