Da sich grad mal wieder eine Festplatte im Raid verabschiedet hat.
Um die Festplatte zu trennen:
unimatrix2 ~ # echo 1 > /sys/block/sdd/device/delete
Neue Festplatte erkennen:
unimatrix2 ~ # echo "- - -" > /sys/class/scsi_host/host4/scan
Vorraussetzung ist natürlich, daß der SATA Controller Hotplug unterstützt, was wohl aber die meisten können.
How to use the error led on a Soekris net5501 as system heartbeat/load indicator.
Necessary linux kernel configuration.
Device Drivers --->
[*] GPIO Support --->
AMD CS5535/CS5536 GPIO support
[*] Multifunction device drivers --->
Support for CS5535 and CS5536 southbridge core functions
[*] LED Support --->
[*] LED Class Support
LED Support for Soekris net5501 series Error LED
LED Support for GPIO connected LEDs
[*] Platform device bindings for GPIO LEDs
[*] LED Trigger support
LED Heartbeat Trigger
Note: If the item under “GPIO Support” doesn’t show up, look into the “Staging drivers” section and disable the old GPIO driver.
Start the new kernel and load the necessary modules and set the trigger.
modprobe leds_net5501 modprobe ledtrig_heartbeat echo heartbeat > /sys/class/leds/error/trigger
If everything went well, the LED flashes. And if the system load goes up, it’s going faster.
Save the settings, so everything is up and running after a reboot.
Instructions for Gentoo linux(requires baselayout-2/OpenRC).
Add the modules to /etc/conf.d/modules
modules="leds_net5501 ledtrig_heartbeat"
Create a new file /etc/local.d/heartbeat.start
echo heartbeat > /sys/class/leds/error/trigger
Make the file executable
chmod 755 /etc/local.d/heartbeat.start
Update, Linux kernel > 3.6.0:
Sysfs layout has been changed with Linux kernel 3.6.0.
File /etc/local.d/heartbeat.start need a little change.
echo heartbeat > "/sys/class/leds/net5501:1/trigger"