CLI Guide

Priority at which data-redundancy utilities, such as disk-group verify and reconstruct, run with
respect to I/O operations competing for the system's processors. (This does not affect disk-group
background scrub, which always runs at “background” priority.)
● High: Utilities have higher priority than host I/O. Use when your highest priority is to return the
system to a fully fault-tolerant state. This can cause heavy I/O to be slower than normal.
● Medium: Utility performance is balanced with host I/O performance.
● Low: Utilities run at a slower rate with minimal effect on host I/O.
SMART
Shows whether SMART (Self-Monitoring Analysis and Reporting Technology) is enabled or disabled
for disks.
● Detect-only: Each disk in the system retains its individual SMART setting, as will new disks
added to the system.
● Enabled: SMART is enabled for all disks in the system and will be enabled for new disks added to
the system.
● Disabled: SMART is disabled for all disks in the system and will be disabled for new disks added
to the system.
Dynamic Spare Configuration
Shows whether the storage system will automatically use a compatible disk as a spare to replace a
failed disk in a disk group if no compatible spare is available.
● Disabled: The dynamic spares feature is disabled.
● Enabled: The dynamic spares feature is enabled.
Enclosure Polling Rate
Shows the interval in seconds at which the storage system will poll each enclosure's Enclosure
Management Processor (EMP) for status changes, from 5 to 3600 seconds.
host cache control
Shows whether hosts are allowed to use the SCSI MODE SELECT command to change the storage
system's write-back cache setting.
● Disabled: Host control of caching is disabled.
● Enabled: Host control of caching is enabled.
Sync Cache Mode
Shows how the SCSI SYNCHRONIZE CACHE command is handled.
● Immediate: Good status is returned immediately and cache content is unchanged. This option is
the default.
● Flush to disk: Good status is returned only after all write-back data for the specified volume
is flushed to disk.
Independent Cache Performance Mode
Shows the cache redundancy mode for a dual-controller storage system.
● Disabled: Controller failover is enabled and data in a controller’s write-back cache is mirrored to
the partner controller.
● Enabled: The controllers use Independent Cache Performance Mode, in which 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.
Missing LUN Response
Shows whether host drivers may probe for LUNs until the host drivers reach the LUN to which they
have access.
● Not ready: Sends a reply that there is a LUN where a gap has been created but that it’s “not
ready.” Sense data returned is sensekey = 2, code = 4, qualifier = 3.
● Illegal: Sends a reply that there is a LUN but that the request is “illegal.” Sense data returned
is sensekey = 5, code = 25h, qualifier = 0.
CompactFlash FailureController Failure
Shows whether the cache policy will change from write-back to write-through when a controller fails.
166
Alphabetical list of commands