CLI Guide

Table 21. controllers properties (continued)
Name Type Description
• 0: Left
• 1: Right
• 2: Top
• 3: Bottom
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.
API basetype properties 299