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Dell PowerVault ME4 Series Storage System CLI Guide

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set advanced-settings


Description	Sets advanced system configuration parameters.
Minimum role	manage
Syntax	set advanced-settings [auto-stall-recovery enabled\|disabled\|on\|off] [auto-write-back enabled\|disabled\|on\|off] [background-disk-scrub enabled\|disabled\|on\|off] [background-scrub enabled\|disabled\|on\|off] [background-scrub-interval `interval`] [compact-flash-failure enabled\|disabled\|on\|off] [controller-failure enabled\|disabled\|on\|off] [dynamic-spares enabled\|disabled\|on\|off] [emp-poll-rate `rate`] [fan-failure enabled\|disabled\|on\|off] [host-cache-control enabled\|disabled\|on\|off] [large-pools enabled\|disabled\|on\|off] [managed-logs enabled\|disabled\|on\|off] [missing-lun-response notready\|illegal] [partner-firmware-upgrade enabled\|disabled\|on\|off] [partner-notify enabled\|disabled\|on\|off] [power-supply-failure enabled\|disabled\|on\|off] [restart-on-capi-fail enabled\|disabled\|on\|off] [single-controller] [smart enabled\|disabled\|on\|off\|detect-only] [spin-down enabled\|disabled\|on\|off] [spin-down-delay delay] [super-cap-failure enabled\|disabled\|on\|off] [sync-cache-mode immediate\|flush] [temperature-exceeded enabled\|disabled\|on\|off] [utility-priority low\|medium\|high]
Parameters	auto-stall-recovery enabled\|disabled\|on\|off Optional. 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 or off: Auto stall recovery is disabled. The system will constantly perform auto stall detection in the background but will not automatically perform recovery actions. enabled or on: 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. auto-write-back enabled\|disabled\|on\|off Optional. Sets whether the cache mode will change from write-through to write-back when the trigger condition is cleared. disabled or off: Auto-write-back is disabled. enabled or on: Auto-write-back is enabled. This is the default. background-disk-scrub enabled\|disabled\|on\|off Optional. Sets 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. The first time you enable this parameter, background disk scrub will start with minimal delay. If you disable and then re-enable this parameter, background disk scrub will start 72 hours after the last background disk scrub completed. disabled or off:Background disk scrub is disabled. This is the default. enabled or on: Background disk scrub is enabled. background-scrub enabled\|disabled\|on\|off Optional. Sets whether disks in disk groups are automatically checked for disk defects to ensure system health. The interval between background disk-group scrub finishing and starting again is specified by the background-scrub-interval parameter. disabled or off:Background disk-group scrub is disabled. This is the default. enabled or on: Background disk-groupscrub is enabled. background-scrub-interval `interval` Optional. Sets the interval in hours between background disk-group scrub finishing and starting again, from 0 to 360 hours. The default is 24 hours. compact-flash-failure enabled\|disabled\|on\|off Optional. Sets whether the cache policy will change from write-back to write-through when CompactFlash memory is not detected during POST (Power-On Self-Test), fails during POST, or fails during controller operation. disabled or off:The CompactFlash failure trigger is disabled. enabled or on: The CompactFlash failure trigger is enabled. This is the default. controller-failure enabled\|disabled\|on\|off Optional. Sets whether the cache policy will change from write-back to write-through when a controller fails. disabled or off: The controller failure trigger is disabled. This is the default. enabled or on: The controller failure trigger is enabled. dynamic-spares enabled\|disabled\|on\|off Optional. Enables or disables the dynamic spares feature. This feature lets you use all of your disks in fault-tolerant disk groups without designating a disk as a spare. With dynamic spares enabled, if a disk fails and you replace it with a compatible disk, the storage system rescans the bus, finds the new disk, automatically designates it a spare, and starts reconstructing the disk group. A compatible disk has enough capacity to replace the failed disk and is the same type. If a spare or available compatible disk is already present, the dynamic spares feature uses that disk to start the reconstruction and the replacement disk can be used for another purpose. disabled or off: The dynamic spares feature is disabled. This is the default. enabled or on: The dynamic spares feature is enabled. emp-poll-rate rate Optional. Sets the interval at which the storage system will poll each enclosure's Enclosure Management Processor (EMP) for status changes, from 5 to 3600 seconds. Typically you can use the default, 5 seconds. Increasing the interval might slightly improve processing efficiency, but changes in device status are communicated less frequently. For example, this increases the amount of time before LEDs are updated to reflect status changes. Decreasing the interval slightly decreases processing efficiency, but changes in device status are communicated more frequently. For example, this decreases the amount of time before LEDs are updated to reflect status changes. fan-failure enabled\|disabled\|on\|off Optional. Sets whether the cache policy will change from write-back to write-through when a fan fails. disabled or off: The fan failure trigger is disabled. This is the default. enabled or on: The fan failure trigger is enabled. host-cache-control enabled\|disabled\|on\|off Optional. Sets whether hosts are allowed to use the SCSI MODE SELECT command to change the storage system's write-back cache setting. disabled or off: Host control of caching is disabled. This is the default. enabled or on: Host control of caching is enabled. large-pools enabled\|disabled\|on\|off Optional. Enables or disables the capability to create a virtual pool larger than 512 TiB on each controller by limiting the number of user-defined snapshots that can be created in snapshot trees. disabled or off: The maximum size for a virtual pool will be 512 TiB. The maximum number of volumes per snapshot tree will be 255 (base volume plus 254 snapshots). This is the default. You can disable this setting only if each pool is less than 512 TiB. enabled or on: The maximum size for a virtual pool will be 1024 TiB (1 PiB). The maximum number of volumes per snapshot tree will be 9 (base volume plus 8 snapshots). You can enable this setting only if no snapshot tree has more than 15 volumes. Changing the large-pools setting will automatically restart both controllers, during which time data will be unavailable. managed-logs enabled\|disabled\|on\|off Optional. Enables or disables the managed logs feature, which allows log files to be transferred from the storage system to a log collection system to avoid losing diagnostic data. disabled or off: The managed logs feature is disabled. This is the default. enabled or on:The managed logs feature is enabled. missing-lun-response notready\|illegal Optional. Some operating systems do not look beyond LUN 0 if they do not find a LUN 0 or cannot handle noncontiguous LUNs. This parameter handles these situations by enabling the host drivers to continue probing for LUNs until they reach the LUN to which they have access. This parameter controls the SCSI sense data returned for volumes that are not accessible because they don’t exist or have been hidden through volume mapping (this does not apply to volumes of offline disk groups). Use the default option, notready, unless the system is used in a VMware environment or a service technician asks you to change it to work around a problem. 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. This option is the default. 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. If the system is used in a VMware environment, use this option. partner-firmware-upgrade enabled\|disabled\|on\|off Optional. Sets whether component firmware versions are monitored and will be automatically updated on the partner controller. disabled or off: Partner firmware upgrade is disabled. enabled or on: Partner firmware upgrade is enabled. This is the default. partner-notify enabled\|disabled\|on\|off Optional. Sets whether to notify the partner controller that a trigger condition occurred. Enable this option to have the partner also change to write-through mode for better data protection. Disable this option to allow the partner to continue using its current caching mode for better performance. Optional. Sets whether to notify the partner controller that a trigger condition occurred. Enable this option to have the partner also change to write-through mode for better data protection. Disable this option to allow the partner continue using its current caching mode for better performance. disabled or off:Notification is disabled. This is the default enabled or on:Notification is enabled. power-supply-failure enabled\|disabled\|on\|off Optional. Sets whether the cache policy automatically changes to write-through when a power supply fails. disabled or off:The power-supply failure trigger is disabled. This is the default. enabled or on:The power-supply failure trigger is enabled. restart-on-capi-fail enabled\|disabled\|on\|off Optional. Sets whether a Storage Controller that experiences a CAPI hang will be forced to restart. This is disabled by default. 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. single-controller For use by a service technician only. Optional. For a system that lacks a second controller module for redundancy and is intended to be used as a single-controller system, this parameter changes the operating/redundancy mode 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. smart enabled\|disabled\|on\|off\|detect-only Optional. Enables or disables SMART (Self-Monitoring Analysis and Reporting Technology) monitoring for all disks in the storage system. When SMART is enabled, the system checks for SMART events one minute after a restart and every five minutes thereafter. SMART events are recorded in the event log. disabled or off:Disables SMART for all disks in the system and for all disks added to the system. enabled or on:Enables SMART for all disks in the system and for all disks added to the system. This is the default. detect-only: Detects but does not change the SMART setting of each disk in the system, and for each new disk added to the system. spin-down enabled\|disabled\|on\|off Optional. Sets whether spinning disks that are available or are global spares will spin down after a period of inactivity shown by the spin-down-delay parameter. disabled or off:Drive spin down for available disks and global spares is disabled. This is the default. Disabling spin down will set the spin-down delay to 0. enabled or on:Drive spin down for available disks and global spares is enabled. If the spin-down-delay parameter is not specified, the delay will be set to 60 minutes. NOTE:Drive spin down is not applicable to ADAPT disk groups or virtual pools. spin-down-delay `delay` Optional. Sets the period of inactivity after which spinning disks that are available or are global spares will spin down. Setting the delay to 1–360 minutes will enable spin down. Setting the delay to 0 will disable spin down. The default is 15 minutes. NOTE:Drive spin down is not applicable to ADAPT disk groups or virtual pools. super-cap-failure enabled\|disabled\|on\|off Optional. Sets 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 or off:The supercapacitor failure trigger is disabled. enabled or on:The supercapacitor failure trigger is enabled. This is the default. sync-cache-mode immediate\|flush Optional. Sets 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: Good status is returned only after all write-back data for the specified volume is flushed to disk. temperature-exceeded enabled\|disabled\|on\|off Optional. Sets whether the system will shut down a controller when its temperature exceeds the critical operating range. disabled or off:The over-temperature trigger is disabled. This is the default. enabled or on:The over-temperature trigger is enabled. utility-priority low\|medium\|high Optional. Sets the 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. This is the default. medium: Utility performance is balanced with host I/O performance. low: Utilities run at a slower rate with minimal effect on host I/O. Use when streaming data without interruption, such as for a web server, is more important than data redundancy.
Examples	Enable partner firmware upgrade. # set advanced-settings partner-firmware-upgrade enabled Enable managed logs. # set advanced-settings managed-logs enabled Disable auto stall recovery. # set advanced-settings auto-stall-recovery disabled
See also	add spares remove spares scrub disk-groups scrub vdisk show advanced-settings