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Dell EMC PowerEdge RAID Controller CLI Reference Guide

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Patrol Read

The PERC Command Line Tool supports the following patrol read commands:
perccli /cx resume patrolread
perccli /cx set patrolread ={{on mode=<auto|manual>}|{off}}
perccli /cx set patrolread [starttime=<yyyy/mm/dd hh>] [maxconcurrentpd=<value>] 
[includessds=<on|off>] [uncfgareas=<on|off>] [excludevd=x-y,z | none]
perccli /cx set patrolread delay=<value> 
perccli /cx show patrolread
perccli /cx start patrolread 
perccli /cx stop patrolread 
perccli /cx suspend patrolread

NOTE: A patrol read operation is scheduled for all the physical drives of the controller.

The detailed description for each command follows.

perccli /cx resume patrolread

This command resumes a suspended patrol read operation.

Input example:

perccli /c0 resume patrolread

perccli /cx set patrolread {=on mode=<auto|manual>}|{off}

This command turns the patrol read scheduling on and sets the mode of the patrol read to automatic or manual.

Input example:

perccli /co set patrolread=on mode=manual

perccli /cx set patrolread [starttime=< yyyy/mm/dd hh>] | [maxconcurrentpd =<value>] | [includessds=<on|onlymixed|off>] | [uncfgareas=on|off] | [excludevd=x-y,z|none] |

This command schedules a patrol read operation. You can use the following options for patrol read command:

Table 1. Set Patrolread input optionsThis table lists and describes the Set Patrolread input options.
Option Value range Description
starttime A valid date and hour in 24 hours format. Sets the start time in yyyy/mm/dd hh format.
maxconcurrentpd Valid number of physical drives present. Sets the number of physical drives that can be patrol read at a single time.
includessds Include SSDs in the patrol read.
uncfgareas Include the areas not configured in the patrol read.
excludevd Excludes virtual drives from the patrol read. To exclude particular virtual drives, you can provide list of virtual drive IDs (x,y, z format) or the range of virtual drives that needs to be excluded from a patrolread (x-y format). If this option is not specified in the command, no virtual drives are excluded.
none Virtual drives if any were excluded before, will be removed.

NOTE: Controller time is taken as a reference for scheduling a patrol read operation.

Input example:

perccli /c0 set patrolread=on starttime=2012/02/21 00

perccli /cx set patrolread [delay=<value>]

This command delays the scheduled patrol read in hours.

Input example:

perccli /c0 set patrolread delay=30

perccli /cx show patrolread

This command shows the progress on the current patrol read in percentage.

Input example:

perccli /c0 show patrolread

perccli /cx start patrolread

This command starts the patrol read operation. This command starts a patrol read immediately.

Input example:

perccli /c0 start patrolread

perccli /cx stop patrolread

This command stops a running patrol read operation.

Input example:

perccli /c0 stop patrolread

NOTE: You cannot resume a stopped patrol read.

perccli /cx suspend patrolread

This command pauses a running patrol read operation.

Input example:

perccli /c0 suspend patrolread

NOTE: You can run this command only when a patrol read operation is running on the controller.


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