CLI Guide

Table 20. controllers properties (continued)
Name Type Description
rotation string Rotation of the controller module in the enclosure.
● 0 Degrees
● 90 Degrees
● 180 Degrees
● 270 Degrees
rotation-numeric string Numeric equivalents for position values.
● 0: 0 Degrees
● 1: 90 Degrees
● 2: 180 Degrees
● 3: 270 Degrees
phy-isolation string 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.
● Disabled: PHY fault isolation is disabled.
phy-isolation-numeric uint32 Numeric equivalents for phy-isolation values.
● 0: Enabled
● 1: Disabled
redundancy-mode string The operating mode of the sytem, 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.
redundancy-mode-numeric uint32 Numeric equivalents for redundancy-mode values.
● 1: Independent Cache Performance Mode
● 2: Active-Active ULP
● 3: Single Controller
● 4: Failed Over
● 5: Down
redundancy-status string
● 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.
redundancy-status-numeric uint32 Numeric equivalents for redundancy-status values.
● 0: Operational but not redundant
● 1: Redundant with independent cache
● 3: Redundant
● 4: Down
● 5: Unknown
unhealthy-component Embedded; see unhealthy-component on page 415.
304 API basetype properties