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Dell EMC Metro node 7.0.1 Online Help

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Logical unit properties

Name
The VPD identifier for the logical unit.
Active AAO Controller
 The active (or ALUA optimized) controller for the logical unit.
Active AAO Visibility
Lists all directors that have a path to the active (or ALUA optimized) controller for this logical unit.
Passive AAN Controller
The passive (or ALUA non-optimized) controller for the logical unit.
Passive AAN Visibility
Lists all directors that have a path to the passive (or ALUA non-optimized) controller for this logical unit.
LUNs
The LUN number on the array.
Storage Volume
The storage volume to which this logical unit belongs.
ALUA Support
Indicates if Asymmetrical Logical Unit Access (ALUA) is supported on the array. Depending on the type of controller exposed to the LUN, one of these values will display. Possible values:

Implicit — The logical unit can change its ALUA access state internally within the array without any external input requesting a change.

Explicit — The logical unit can change its ALUA access state in response to a request from an initiator (metro node back end software).

Implicit explicit — The logical unit has both implicit and explicit capabilities.

None — ALUA is not supported on the array.

Connectivity Status
The connectivity status of the logical unit.
Visibility
Indicates how the logical unit is visible to the controllers. Possible values:

Active optimized — All commands and task management functions can be sent on this path; this path has the highest performance (ALUA arrays only).

Active non-optimized — All commands and task management functions can be sent on this path, but the path has a lower performance than an active optimized path (ALUA arrays only).

Active — The controller actively processing I/O requests.

Both — Both controllers process I/O and provide standby capability for each other. One controller is actively processing I/O while the other is idle in standby mode waiting to process I/O should the active primary controller fail or be taken offline.

None — ALUA is not supported on the array.


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