User's Manual

Table 19. Path between Enclosure n and Enclosure n +1
Health of Logical Connector Path between Enclosure n and Enclosure n +1
Connector 0 (C0) Connector 1 (C1)
Available Available
Available Disconnected
Disconnected Available
In the above scenario, the enclosure status is displayed in warning mode. Clicking Information/
Configuration in the Enclosures page displays all enclosure components (EMMs, Fans, Physical Disks,
Power Supplies, and Temperature) in normal condition. To view the Path Failure message to indicate that
the enclosure has lost a communication path to the controller, indicating that the enclosure is no longer
in redundant path mode.
Related Links
Path Health
Clearing The Connectors Redundant Path View
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. 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 Changing The 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 Links
Setting The Redundant Path Configuration
Logical Connector Properties And Tasks
Setting The Patrol Read Mode
Does my controller support this feature? See Supported Features.
Patrol read identifies disk errors in order to avoid disk failures and data loss or corruption. The Set Patrol
Read task is applicable only for disks used as virtual disks or hot spares.
The Set Patrol Read tasks run in the background and corrects, when possible. When the Set Patrol Read
mode is set to Auto, patrol read is initiated when the controller is idle for a period of time and when no
other background tasks are active. In this scenario, the patrol read enhances the system performance as
disk errors can be identified and corrected when there is not input/output activity on the disk.
The controller adjusts the amount of system resources dedicated for patrol read based on the amount of
controller activity that is competing with the Patrol Read task. When the controller activity is high, fewer
system resources are dedicated to the patrol read task.
Patrol Read does not run on a physical disk in the following circumstances:
• The physical disk is not included in a virtual disk or is assigned as a hot spare.
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