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My Dell servers with Perc H700 Controller are automatically performing periodic Patrol Reads.

Is there a way to set schedule for these checks?

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  • Keep in mind that these are designed to take place as a low-priority operation. If you have a large amount of production I/O taking place during a patrol read, it's going to take high priority over the patrol read. – JimNim Sep 4 '13 at 13:18
  • It's configurable, but I want to shift it to the nighttime operation, when server is idle. I prefer it to be 90% at nighttime than 5% at daytime. – GioMac Sep 4 '13 at 13:19
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There is no way to control Patrol Reads if it is set to run automatically. You will have to switch to manual and schedule checks. From OMSA CLI:

Use

omreport storage controller to find controller Id.

Set Patrol Read Mode to Manual:

omconfig storage controller action=setpatrolreadmode controller=XX mode=manual where XX is correct controller Id

Command to schedule (to run Patrol Read):

omconfig storage controller action=startpatrolread controller=XX

Further reading:

Server Administrator Storage Management User’s Guide

Dell OpenManage Server Administrator Version 7.2 Command Line Interface Guide

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  • yeps, came to the same conclusion. looks like i must to add this command to the cron. Thanks for the answer – GioMac Sep 4 '13 at 11:46

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