Load_Cycle_Count and ATA APM

Kostik Belousov kostikbel at gmail.com
Tue Feb 5 13:45:18 UTC 2008


On Tue, Feb 05, 2008 at 01:07:49PM +0000, Vince Hoffman wrote:
> Kostik Belousov wrote:
> > I noted that when idle, my laptop HDD increases the Load_Cycle_Count
> > (193) approx. each ten seconds, as reported by smartctl. Have recently
> > read about the Ubuntu and APM mode for hard drives, I searched for the
> > tool to tune APM (that has functionality similar to linux' hdparm -B).
> > 
> > It seems that FreeBSD does not have a tool ? Am I wrong ? In case I did
> > not make a mistake, below is the patch that allows to manage APM state
> > of the hard drive using atacontrol.
> > 
> /usr/ports/sysutils/ataidle  exists and is usable, (I use it on my
> laptop.) However it seems it could be a sensible thing to have in
> atacontrol.
I never looked into it, and I have heard that it has an architectural
problems. BTW intent of my patch is to have the ability to turn APM off.
Can ataidle do this ?

> 
> Vince
> 
> > Any comments or objections against committing this ?
> > http://people.freebsd.org/~kib/misc/ata_setcap.1.patch
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