I have DELL Latitude D830 since 2 days now with a Samsung HM12HII drive.

I have this bug of too much clicks (I hear them 5-10 times per minute in
average).

So I tried each solution found on that bug report and many other sources
(mainly blogs that are saying same things than here since it envolved
the same people) : hdparm.conf with both -B 254 and 255, laptop_mode
enable with  CONTROL_HD_POWERMGMT=1, and finally (I had hope when
reading the previous post) the trick for some Samsung owner (smartcl -o
on /dev/sda)

Unfortunately the problem remains the same whatever the ugly fix is in
use. Of course I checked both Load_Cycle_Count raw value and Worst/Tresh
values, and checked that one increment is related to one click heard.

Here are some values :

225 Load_Cycle_Count        0x0012   099   099   000    Old_age   Always       
-       748
9 Power_On_Hours          0x0032   099   099   000    Old_age   Always       -  
     1154

One more thing : the hdparm -I /dev/sda command give me this strange
thing (also reported by other people) :

Advanced power management level: unknown setting (0x0000)

I know that 2 days is very short time, but 748 sings already very bad
for HDD life time ! Just to compare, I have an old laptop (Asus) with a
2 months Hitachi drive, and I have a Load_Cycle_Count of 192, stabilized
(I cannot hear any click).

So, as it is mentioned here, fixes proposed here are not solution, at
least for me, but overall, it shows us that we did not understand the
problem (I mean real causes, process involved...).

Hope we'll find a good (true) solution for that really bad problem !

Mathieu

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High frequency of load/unload cycles on some hard disks may shorten lifetime
https://bugs.launchpad.net/bugs/59695
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