CLI Guide
Table 8. cache-parameter properties (continued)
Name Type Description
• Adaptive: Adaptive read-ahead is enabled, which allows the controller to
dynamically calculate the optimum read-ahead size for the current workload.
• Stripe: Read-ahead is set to one stripe. The controllers treat NRAID and RAID-1
disk groups internally as if they have a stripe size of 512 KB, even though they are
not striped.
• 512 KB, 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, or 32 MB: Size selected by a user.
read-ahead-numeric uint32 Numeric equivalents for read-ahead-size values.
• -2: Stripe
• -1: Adaptive
• 0: Disabled
• 524288: 512 KB
• 1048576: 1 MB
• 2097152: 2 MB
• 4194304: 4 MB
• 8388608: 8 MB
• 16777216: 16 MB
• 33554432: 32 MB
cache-settings
This basetype is used by show cache-parameters on page 163 to show system cache properties.
Table 9. cache-settings properties
Name Type Description
operation-mode string
The operating mode of the system, also called the cache redundancy mode.
• Independent Cache Performance Mode: For a dual-controller system,
controller failover is disabled and data in the write-back cache if the controller 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.
operation-mode-numeric uint32
Numeric equivalents for operation-mode values.
• 1: Independent Cache Performance Mode
• 2: Active-Active ULP
• 3: Single Controller
• 4: Failed Over
• 5: Down
controller-cache-parameters Embedded, see controller-cache-parameters on page 294
certificate-status
This basetype is used by show certificate on page 165show certificate.
API basetype properties
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