kern/133593: [ata] `atacontrol spindown` won't affect disk until some data is read from it

[Bruce Cran]

The following reply was made to PR kern/133593; it has been noted by GNATS.

From: Bruce Cran <bruce at cran.org.uk>
To: Dmitry Marakasov <amdmi3 at amdmi3.ru>
Cc: bug-followup at FreeBSD.org
Subject: Re: kern/133593: [ata] `atacontrol spindown` won't affect disk
 until some data is read from it
Date: Sat, 11 Apr 2009 14:20:19 +0100

 On Sat, 11 Apr 2009 16:36:31 +0400
 Dmitry Marakasov <amdmi3 at amdmi3.ru> wrote:
 
 > Then maybe it's possible to make atacontrol make some dummy
 > request after the timeout is set?
 
 The drive has an onboard timer that can be programmed so the drive
 spins down after a predetermined length of time it's been unused.  I'm
 not sure why the kernel's keeping track of this too and sending an
 immediate spindown command instead of telling it how long it should wait
 until spinning down.
 
 -- 
 Bruce Cran