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[DragonFlyBSD - Bug #2531] camcontrol fails to disable APM


From: Sascha Wildner via Redmine <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 23 Mar 2013 12:28:30 -0700

Issue #2531 has been updated by swildner.


OK, I've pushed (and MFC'd) a fix that allows turning off APM for disks at least with nata(4).

I think in order to have have this for AHCI attached disks too (via camcontrol(8)), we'd have to integrate ATA into CAM like FreeBSD did. But I'm not 100% sure about this.

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Bug #2531: camcontrol fails to disable APM
http://bugs.dragonflybsd.org/issues/2531

Author: m.lombardi85
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


I installed dragonfly BSD on an AMD64 laptop but I have a problem.

The hard disk is continuously spinning up and down every few seconds;
on FreeBSD I normally execute the following command to disable APM

#camcontrol cmd ad0 -c "EF 85 00 00 00 00 00 00 00 00 00 00"

but unfortunately it fails on dragonfly with the following error message:

camcontrol: error sending command


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