Help with new portable mac hdd

Discussion in 'MacBook Pro' started by spikeyjac, Feb 23, 2010.

  1. spikeyjac macrumors regular

    Joined:
    Sep 16, 2006
    #1
    Just bought a western digital passport ( old version black with silver outline) 320gb for mac..
    I was copying some data, however, when I went to get up ( having had my laptop on my lap) the hard drive made a whirring sound when I moved it and started clicking.. is this a sign of failure, or just because I moved it? :(
     
  2. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #2
    It's because you moved it. Don't do that too often.
     
  3. spikeyjac thread starter macrumors regular

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    Sep 16, 2006
  4. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #4
    The HDD spins its platter(s) at a maximum of 5400 rounds per minute (RPM), which are 90 rounds per second.
    There is also the read/write head which is being held by an arm that moves above the platter(s).

    During an abrupt movement, this head gets crushed onto the platters if no fail-safe is implemented with this drive.
    Most probably some anti-shock system is built into the HDD, which prevents that by parking the arm and head and stopping the platter(s).

    The abrupt stop of the platter(s) creates that whirring sound, the parking of the head/arm produces the clicking.

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  5. spikeyjac thread starter macrumors regular

    Joined:
    Sep 16, 2006
    #5
    Okay cheers :eek:
    how come my other external hdd's don't do it thoughh?
     
  6. ayeying macrumors 601

    ayeying

    Joined:
    Dec 5, 2007
    Location:
    Yay Area, CA
    #6
    Every drive is designed differently. Some have more active free-fall sensors, others don't have that sensitive sensors and some don't have it. I know none of my desktop external hard drives have any free-fall sensors in them so if I drop it, well... there goes all the data.
     

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