User's Manual

Controllers 127
Clearing the Redundant Path View
Consider a case where you reboot your system and Storage Management,
displays the Logical Connector with a path failure message. It is possible that
you may have intentionally unplugged the second connector. In this case, the
path failure message is not relevant. Else, there could be a fault in the
connected cable or the cable may not be connected properly to the controller.
In both cases, Storage Management displays that the system was in
redundant path configuration before reboot and is no longer in this
configuration. If you are sure you do not want the redundant path mode, clear
the existing redundant path view using Clear Redundant Path View provided
in the Change Controller Properties controller task. Selecting this option
clears the redundant path view and the connectors are represented on the
user interface as Connector 0 and Connector 1.
Related Topics
• Logical Connector Properties and Tasks
• Enclosure and Backplane Properties and Tasks
Set Patrol Read Mode
Does my controller support this feature? See Supported Features.
Patrol Read is a feature for identifying disk errors in order to avoid disk
failures and data loss or corruption. The Patrol Read only runs on disks that
are being used in a virtual disk or that are hot spares.
When possible, the Patrol Read corrects disk errors and restores the integrity
of the data. The Patrol Read task runs in the background. When the Patrol
Read mode is set to Auto, the Patrol Read is initiated when the controller has
been idle for a period of time and when no other background tasks are active.
In this circumstance, the Patrol Read feature also enhances system
performance as disk errors can be identified and corrected while the disk is
not the subject of I/O activity.
The controller adjusts the amount of system resources dedicated to the Patrol
Read based on the amount of controller activity that is competing with the
Patrol Read task. During heavy controller activity, fewer system resources are
dedicated to the Patrol Read task.