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    If your user's refuse to shutdown your computers the correct way even with a mechanical drive data corruption will happen. Resolve the human element and the problem will solve itself. Of course the solution is scheduled tasks that shutdown every computer and a timer that turns on/off the power for the room.
    – Ramhound
    Commented Sep 5, 2013 at 13:49
  • I agree. You are looking for a hardware solution to a non hardware problem. Either apply reason, a clue-bat or a 'oh, you forgot to shut down? I will fix that tomorrow, meanwhile please pick your nose and hope your projects finish on-time.`
    – Hennes
    Commented Sep 5, 2013 at 14:01
  • I can repair a PC order new disks, but i cannt do that with people. I just need to know if normal disks will get their heads into parking mode when a sudden power drops
    – user613326
    Commented Sep 5, 2013 at 14:10
  • @user613326 - did you see this question?superuser.com/questions/103861/…
    – Carl B
    Commented Sep 5, 2013 at 16:01
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    "would it be safer to use normal hard disks ?" No, dirty shutdowns will cause data corruption for both HDDs and SDDs. Most HDDs will park the heads on loss of power. One solution is to move the data from the PCs to central servers, and turn the PCs into networked terminals.
    – sawdust
    Commented Sep 6, 2013 at 0:02