Controller module ID: A or B. Serial Number
- Serial number.
- Not Available: The controller module
is down or not installed.
Hardware VersionHardware
version. CPLD VersionComplex Programmable
Logic Device firmware version. MAC AddressNetwork port MAC address. WWNNStorage system World Wide Node Name (WWNN). IP AddressNetwork port IP address. IP Subnet MaskNetwork port IP subnet mask. IP GatewayNetwork port gateway IP
address. DisksNumber of disks
in the storage system. Virtual PoolsNumber of virtual pools in the storage system. Vdisks
(v2)Disk Groups (v3) Number of disk groups in the storage system. System Cache Memory (MB)Controller module
cache memory size, in MB, including CPU memory available to I/O. Host PortsNumber of host ports in
the controller module. Disk ChannelsNumber of expansion ports in the controller enclosure. Disk Bus TypeType of interface between the
controller module and disks: Status
- Operational
- Down
- Not Installed
Failed Over to This ControllerIndicates 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 ReasonIf Failed
Over to This Controller is Yes, a reason for the failover appears;
otherwise, Not applicable appears. Multi-coreShows whether the controller module is using multiple
processing cores.
- Enabled: Multiple cores are active.
- Disabled: A single core is active.
Health
- OK
- Degraded
- Fault
- N/A
- Unknown
Health ReasonIf Health is
not OK, this field shows the reason for the health state. Health RecommendationIf Health is not OK,
this field shows recommended actions to take to resolve the health
issue. PositionPosition of the
controller in the enclosure:
- Left: The controller is in the left
slot.
- Right: The controller is in the right
slot.
- Top: The controller is in the top
slot.
- Bottom: The controller is in the
bottom slot.
Phy IsolationShows 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.
- 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.
Controller Redundancy Status
- Redundant with independent cache:
Both controllers are operational but are not mirroring their cache
metadata to each other.
- Redundant: Both controllers are
operational.
- Operational but not redundant: In
active-active mode, one controller is operational and the other is
offline. In single-controller mode, the controller is operational.
- Down: This controller is not operational.
- Unknown: Status information is not
available.
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