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Dell PowerVault ME5 Series Storage System CLI Reference Guide

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show advanced-settings

Description Shows the settings for advanced system-configuration parameters.
Minimum role monitor
Syntax show advanced-settings
Output Disk Group Background Scrub

Shows whether disks in disk groups are automatically checked for disk defects to ensure system health. The interval between a scrub finishing and starting again is specified by the Disk Group Background Scrub Interval field.

  • Disabled: Background disk-group scrub is disabled.
  • Enabled: Background disk-group scrub is enabled.
Disk Group Scrub Interval (v2)

Shows the interval between background disk-group scrub finishing and starting again, from 0 to 2160 hours (90 days).

Partner Firmware Upgrade

Shows whether component firmware versions are monitored and will be automatically updated on the partner controller.

  • Disabled: Partner firmware upgrade is disabled.
  • Enabled: Partner firmware upgrade is enabled.
Utility Priority

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. 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. The dynamic spares feature does not apply to ADAPT disk groups.

  • Disabled: The dynamic spares feature is disabled.
  • Enabled: The dynamic spares feature is enabled.
  • Alternate: The dynamic spares feature is enabled but spare selection is restricted to the enclosure that contains the failed disk.
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. Hosts can use the SCSI MODE SELECT command to change the write-back cache setting. This is the default.
  • Enabled: Host control of caching is enabled. Hosts cannot override the storage system's write-back cache setting.
Sync Cache Mode

Shows how the SCSI SYNCHRONIZE CACHE command is handled.

  • Immediate: Good status is returned immediately and cache content is unchanged.
  • Flush to disk: Good status is returned only after all write-back data for the specified volume is flushed to disk.

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.
Controller Failure

Shows whether the cache policy will change from write-back to write-through when a controller fails.

  • Disabled: The controller failure trigger is disabled.
  • Enabled: The controller failure trigger is enabled.
Supercap Failure

Shows whether the cache policy will change from write-back to write-through when the supercapacitor that provides backup power for cache is not fully charged or fails.

  • Disabled: The supercapacitor failure trigger is disabled.
  • Enabled: The supercapacitor failure trigger is enabled.
Power Supply Failure

Shows whether the cache policy automatically changes to write-through when a power supply fails.

  • Disabled: The power-supply failure trigger is disabled.
  • Enabled: The power-supply failure trigger is enabled.
Fan Failure

Shows whether the cache policy will change from write-back to write-through when a fan fails.

  • Disabled: The fan failure trigger is disabled.
  • Enabled: The fan failure trigger is enabled.
Temperature Exceeded

Shows whether the system will shut down a controller when its temperature exceeds the critical operating range.

  • Disabled: The over-temperature trigger is disabled.
  • Enabled: The over-temperature trigger is enabled.
Partner Notify

Shows whether the partner controller will be notified when that a trigger condition occurs. .

  • Disabled: Notification is disabled. The partner controller will continue using its current caching mode.
  • Enabled: Notification is enabled. The partner controller will change to write-through mode for better data protection.
Auto Write Back

Shows whether the cache mode will change from write-through to write-back when the trigger condition is cleared.

  • Disabled: Auto-write-back is disabled.
  • Enabled: Auto-write-back is enabled.
Inactive Drive Spin Down

Shows whether spinning disks that are available or are global spares will spin down after a period of inactivity shown by the Inactive Drive Spin Down Delay field.

  • Disabled: Drive spin down for available disks and global spares is disabled.
  • Enabled: Drive spin down for available disks and global spares is enabled.
Inactive Drive Spin Down Delay

Shows the period of inactivity in minutes after which spinning disks that are available or are global spares will spin down, from 1 to 360 minutes. The value 0 means spin down is disabled.

Disk background scrub

Shows whether disks that are not in disk groups are automatically checked for disk defects to ensure system health. The interval between background disk scrub finishing and starting again is 72 hours.

  • Disabled: Background disk scrub is disabled.
  • Enabled: Background disk scrub is enabled.
Managed Logs

Shows whether the managed logs feature is enabled, which allows log files to be transferred from the storage system to a log collection system to avoid losing diagnostic data as logs fill.

  • Disabled: The managed logs feature is disabled.
  • Enabled: The managed logs feature is enabled.
Single Controller Mode

For a system that lacks a second controller module for redundancy and is intended to be used as a single-controller system, this property shows whether the operating/redundancy mode is set to Single Controller. This prevents the system from reporting the absent partner controller as an error condition. This parameter does not affect any other system settings. Installing a second, functional controller module will change the mode to Active-Active ULP.

  • Enabled: Single controller mode is enabled.
  • Disabled: Single controller mode is disabled.
Auto Stall Recovery

Shows whether the auto stall recovery is enabled, which detects situations where a controller stall is preventing I/O operations from completing, and recovers the system so that at least one controller is operational, thus avoiding data-unavailability situations. This feature focuses on failover/recovery stalls. When a stall is detected, event 531 is logged.

  • Disabled: Auto stall recovery is disabled. The system will constantly perform auto stall detection in the background but will not automatically perform recovery actions.
  • Enabled: Auto stall recovery is enabled. The system will constantly perform auto stall detection in the background and automatically perform recovery actions. This is the default.
Restart on CAPI Fail

Shows whether a Storage Controller that experiences a CAPI hang will be forced to restart. A CAPI hang is perceived as a management-interface hang. As part of the restart process, a dump file is created and event 107 is logged. To provide the dump file to technical support for debugging, use the Save Logs action in the PowerVault Manager.

Auto Map

Shows whether the auto map feature is enabled or disabled. When auto map is enabled, the system automatically maps initiators or hosts to volumes or volume groups that are mapped to a host group when those initiators or hosts are added to the host group.

Auto Unmap

Shows whether the auto unmap feature is enabled or disabled. When auto unmap is enabled, the system automatically unmaps initiators or hosts from volumes or volume groups that are mapped to a host group when those initiators or hosts are removed from the host group.

Examples Show advanced system-configuration settings.

# show advanced-settings

Basetypes advanced-settings-table

status

See also set advanced-settings

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