CLI Guide
Table 143. volumes properties (continued)
Name Type Description
• no-mirror: In this mode of operation, the controller cache performs the same as
the standard mode with the exception that the cache metadata is not mirrored to
the partner. While this improves the response time of write I/O, it comes at the cost
of redundancy. If this option is used, the user can expect higher write performance
but is exposed to data loss if a controller fails.
cache-optimization-numeric uint32 Numeric equivalents for cache-optimization values.
• 0: standard
• 2: no-mirror
read-ahead-size string The read-ahead cache setting of the volume.
• Disabled: Read-ahead is disabled.
• 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-size-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
• 2147483648: Maximum
volume-type string
• base: Base volume
• standard: Standard volume.
• snapshot: Snapshot volume.
volume-type-numeric uint32 Numeric equivalents for volume-type values.
• 0: standard
• 3: snapshot
• 15: base
volume-class string
• • standard: Standard volume.
volume-class-numeric uint32 Numeric equivalents for volume-class values.
• 0: standard
tier-affinity string
• No Affinity: This setting uses the highest available performing tiers first and
only uses the Archive tier when space is exhausted in the other tiers. Volume data
will swap into higher performing tiers based on frequency of access and tier space
availability
• Archive: This setting prioritizes the volume data to the least performing tier
available. Volume data can move to higher performing tiers based on frequency of
access and available space in the tiers.
428 API basetype properties