Monday, February 20, 2012

Load cycle bug at notebook hdd

All Debian versions i know hat a load-cycle bug in
the hdd driver. This means: When the kernel found a notebook
he activates the hdd power saving.
The hdd go into sleep every 60 seconds and is quickly waked up.
In this case, the s.m.a.r.t. load cycles increase the load-cycle-count
very quick. After a short time the hdd will fail!

You can test it with the smartmontools:
smartctl -a /dev/hda | grep Load_Cycle_Count

Here you can see the value. If it grows fast you can change
turn it off with hdparm:
hdparm -B 254 /dev/hda

I addes it to /etc/rc.local so that it is startet every boot.

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