Certain desktop drives are also affected. Western Digital is using rapid
parking as a selling point of it's green drives. They give three years
of warranty but apparently they haven't tested these drives with a Linux
desktop.

Western Digital's power saving desktop drives (WD Caviar GP) such as WD10EACS 
can handle 300.000 Load_Cycles 
http://westerndigital.com/en/library/sata/2879-701229.pdf

Western Digital's power saving enterprise drives (WD RE2-GP) such as WD1000FYPS 
can handle 600.00 Load_Cycles
http://westerndigital.com/en/library/sata/2879-701236.pdf

chrischan has a WD10EACS and reported a load cycle count is 5678 after 86 
hours. This means he is seeing 66 Load_Cycles per hour and his drive will reach 
it's specification (300.000) after 4544 hours of usage which is after 379 days  
http://ubuntuforums.org/showpost.php?p=3719777&postcount=368

-- 
High frequency of load/unload cycles on some hard disks may shorten lifetime
https://bugs.launchpad.net/bugs/59695
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Bugs, which is the bug contact for Ubuntu.

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