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
Alphabetical list of commands
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