hdparm ( click clack hard-disk hdd disable APM)

[giostark]

Sui portatili linux setta un APM (advanced power menagement) troppo aggressivo, con il risultato che di continuo si sente il rumore delle testine andare a fondo corsa, il cosi' detto click clack. Sospensione , che durante un normale utilizzo puo' creare dei rallentamenti, o parziali bloccaggi.
Per risolvere si puo' installare un applicativo (che in moltissime distro e' preinstallato):
hdparm
L'utilizzo:
da console (root) , digitare "hdparm -B 255 /dev/nome-del-device"
L'opzione 255 disattiva completamente l'APM.
Il programma funziona solo su ATA,SATA,SCSI ... quindi non tentate su drive USB.

setting Advanced Power Management level to disabled
HDIO_DRIVE_CMD failed: Invalid exchange
HDIO_DRIVE_CMD(identify) failed: Invalid exchange

Ci sono diverse soluzioni per tutte le distro, questa e' la piu' veloce .
Linux sui portatili brucia gli hard disk | HTML.it forum

Qui per sapere tutto del vostro HDD:
GSmartControl

[giostark]

Link diretto ad una guida su opensuse:
Disk Power Management - openSUSE


Disk Power Management Configuration

Create a configuration file to management disk power management:
/etc/pm/config.d/disk

# Configure disk power management settings to ensure both
# long disk life and good power management.
#
# Space delimited list of disk devices this affects.
#
DEVICES_DISK_PM_NAMES="/dev/sda"
#
#
# Power management modes
#
# Powersave mode off
# Disable APM and spin-down
#
DEVICES_DISK_PM_POWERSAVE_OFF="hdparm -q -B 255 -q -S 0"
#
# Powersave mode on
# Enable APM to conservative 200 and set spin-down for 21 minutes
#
DEVICES_DISK_PM_POWERSAVE_ON="hdparm -q -B 200 -q -S 252"

Note: Your laptop drive can get hot with no power management if you leave your laptop plugged in all the time. You may want to set DEVICES_DISK_PM_POWERSAVE_OFF to a large value, but not disabled completely. If you were going to do this, you might use something like: hdparm -q -B 254 -q -S 242
This means set the least power management, but not off, and spin down the disk after an hour.
Note: Some drives do not support the setting of -B 255 to switch off power management, i.e. this setting has no effect at all. (This would be the case if the Load_Cycle_Count increases despite this setting). For those drives -B 254 is the 'next best thing'.
Note: Also, some harddisks do not allow a lot of variability in the setting, e.g. they default to 128 for any value lower than 254. In those cases, you might want to include -B 254 (or 255), even for the POWERSAVE_ON setting. You can find out if this is the case by:
hdparm -B 252 drive (e.g. /dev/sda)
hdparm -I | grep 'Advanced power management'
Then check whether the setting corresponds to what you set it at.
Disk Power Management Script

Then create the power management script:
/etc/pm/power.d/disk

#!/bin/bash
. /usr/lib/pm-utils/functions
. /etc/pm/config.d/disk

if test -z "${DEVICES_DISK_PM_NAMES}"; then
exit 1
fi

case "$1" in
true)
echo "**enabled pm for harddisk"
for DISK_NAME in `echo ${DEVICES_DISK_PM_NAMES}`; do
${DEVICES_DISK_PM_POWERSAVE_ON} ${DISK_NAME}
done ;;
false)
echo "**disabled pm for harddisk"
for DISK_NAME in `echo ${DEVICES_DISK_PM_NAMES}`; do
${DEVICES_DISK_PM_POWERSAVE_OFF} ${DISK_NAME}
done ;;
esac

Make the script executable.
chmod +x /etc/pm/power.d/disk
Test the script

You can then test the set up by using the following commands:

pm-powersave true
hdparm -I /dev/sda | grep 'Advanced Power'

An asterisk next to 'Advanced Power Management feature set' means its enabled. Now try this:

pm-powersave false
hdparm -I /dev/sda | grep 'Advanced Power'

No asterisk means it's disabled.
These settings are immediately accessible to kpowersave or gnome-power-manager and are used by default when plugging in your power adapter or removing it on a laptop.

[frakka]

Questo me lo segno, potrebbe servirmi!!