In OpenDebianSlug you don't get 'lm-profiler' even if you install laptop-mode-tools using apt-get. Do the following in OpenDebianSlug:

• Problem: there is no /proc/sys/vm/block_dump in Unslung 6.8.*

Spinup Debugging

Busybox syslog.conf

Syslog.conf

Busybox syslog.conf

Syslog.conf

Turn on disk activity debugging

Busybox syslog.conf

Syslog.conf

Busybox syslog.conf\

Syslog.conf\

How you modify syslog.conf depends on which syslogd is installed. If your '/sbin/syslogd' is a symbolic link to 'busybox' then you really don't have a fully functional syslogd and should follow the 'Busybox syslog.conf' instructions. Everyone else should follow the 'syslog.conf' instructions.

Busybox syslog.conf/

First stop the syslogd with the command '/etc/init.d/syslog stop' Then edit '/etc/syslog.conf' and Change the 'DESTINATION' to 'buffer' Restart the syslogd with the command '/etc/init.d/syslog start'

Syslog.conf/

You then have to either 'kill -HUP' on the syslogd process or start and stop the daemon.

Turn on disk activity debugging/

In /etc/syslog.conf, you have to place a dash (-) before the log file name, e.g. the line kern.* /var/log/kern.log becomes kern.* -/var/log/kern.log.

Yes, you can. But first, check that you have modified your syslog.conf to not sync.

In syslog.conf, you have to place a dash (-) before the log file name, e.g. the line kern.* /var/log/kern.log becomes kern.* -/var/log/kern.log.

 Then to debug disk activity, you can do:

In OpenDebianSlug? you don't get 'lm-profiler' even if you install laptop-mode-tools using apt-get. Do the following in OpenDebianSlug?:

cd /root wget http://samwel.tk/laptop_mode/tools/downloads/laptop-mode-tools_1.31.tar.gz tar -xzvf laptop-mode-tools_1.31.tar.gz ./laptop-mode-tools-1.31/usr/sbin/lm-profiler

(From http://www.samwel.tk/laptop_mode/tools/faq.html)

See also the existing page, IdentifyWhichProcessesAccessDisk

To find out which process spins up your disk, do this:

This package contains a set of scripts which monitor your hardisk (it could set several energy saving profiles too but the NSLU2 doesnt support this).

To find out which processes spins up your disk, do this:

(From http://www.xs4all.nl/~bsamwel/laptop_mode/tools/faq.html)

Spinup Debugging

My disk spins up all the time and I have no clue what causes this. Can I debug this?

Yes, you can. But first, check that you have modified your syslog.conf to not sync, as described in the next question. To debug disk activity, you can do:

echo 1 > /proc/sys/vm/block_dump

(Warning: you must disable syslogd before you do this, or you must make sure that kernel output is not logged. If you forget this, your system may get into a feedback loop, where syslogd causes disk activity, this causes kernel output, and this causes syslogd to do more disk activity, etcetera!)

This enables file/disk activity debugging in the kernel. You can read the output using dmesg. When you're done, disable block dump using

echo 0 > /proc/sys/vm/block_dump

Under debianslug it is easier to accomplish. Simply install laptop-mode-tools

aptitude install laptop-mode-tools

This package contains a set of scripts which monitor your harrdisk (it could set several energy saving profiles too but the NSLU2 doesnt support this).

The most interesting script is called lm-profiler. Start it with

lm-profiler

and watch it's output. It lets you disable unneeded system services after the scan too if you want.