Arch Linux

kralyk

Member

Registered: 2009-04-27

Posts: 72

HDD put to sleep way too often

Hi,
after upgrade to the newest kernel (.34), my laptop puts hdd to sleep very very often
when running on battery. It practicaly constantly sleeps or awakes the hdd, which I really
don't like, because it harms HDD in long-term.

This happens even when no desktop environment is running, so it definitely is not
Gnome's or KDE's fault. Lapto-mode-utils are not installed. There are no acpid rules as well.
What might be causing this - is it the kernel itself? How do I turn this off?

ber_t

Member

From: Berlin, Germany

Registered: 2010-03-10

Posts: 214

Website

Re: HDD put to sleep way too often

What is the output of `hdparm -B' for your device? It's contained in the package of the same name, in case you don't have it installed.
See also hdparm(8).

kralyk

Member

Registered: 2009-04-27

Posts: 72

Re: HDD put to sleep way too often

$> sudo hdparm -B /dev/sda1

/dev/sda1:
 APM_level      = 254

Update: Sorry that's while the AC was plugged,
when I upplug and run on battery, it reads:

$> sudo hdparm -B /dev/sda1
Heslo: 

/dev/sda1:
 APM_level      = 1

How do I find out what changes it?

Last edited by kralyk (2010-06-24 10:37:55)

ber_t

Member

From: Berlin, Germany

Registered: 2010-03-10

Posts: 214

Website

Re: HDD put to sleep way too often

Don't know, if you're still on it, but this thread sounds similar:
http://bbs.archlinux.org/viewtopic.php?id=99958

Have a look at post #8.