Dot Hill Systems AssuredSAN 6004, Справочное руководство CLI, Страница: 136 / 363

136 Alphabetical list of commands
Failed Over to This Controller
Indicates whether the partner controller has failed over to this controller:
•
No
: The partner controller has not failed over to this controller.
•
Yes
: The partner controller has either failed or been shut down, and its responsibilities have
been taken over by this controller. There will be a delay between the time that the value of
Status
becomes
Down
for one controller and the time that the value of
Failed Over to
This Controller
becomes
Yes
for the other controller. This time period is the time that it
takes for a controller to take over the responsibilities of its partner.
Fail Over Reason
If
Failed Over to This Controller
is
Yes
, a reason for the failover appears; otherwise,
Not applicable
appears.
Health
•
OK
•
Degraded
•
Fault
•
N/A
•
Unknown
Health Reason
If Health is not
OK
, this field shows the reason for the health state.
Health Recommendation
If Health is not
OK
, this field shows recommended actions to take to resolve the health issue.
Position
Position of the controller in the enclosure:
•
Top
: The controller is in the top slot.
•
Bottom
: The controller is in the bottom slot.
Phy Isolation
Shows whether the automatic disabling of SAS expander PHYs having high error counts is enabled
or disabled for this controller.
•
Enabled
: PHY fault isolation is enabled. This is the default.
•
Disabled
: PHY fault isolation is disabled.
Controller Redundancy Mode
Shows the system’s operating mode, also called the cache redundancy mode:
•
Independent Cache Performance Mode
: For a dual-controller system, controller failover is
disabled and data in a controller’s write-back cache is not mirrored to the partner controller. This
improves write performance at the risk of losing unwritten data if a controller failure occurs while
there is data in controller cache.
•
Active-Active ULP
: Both controllers are active using ULP (Unified LUN Presentation). Data
for volumes configured to use write-back cache is automatically mirrored between the two
controllers to provide fault tolerance.
•
Single Controller
: The enclosure contains a single controller.
•
Failed Over
: Operation has failed over to one controller because its partner is not
operational. The system has lost redundancy.
•
Down
: Both controllers are not operational.