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Free-Fall Sensor

Discussion in 'Dell' started by toe4, Jan 26, 2008.

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  1. toe4

    toe4 Notebook Geek

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    i ordered a m1530 with the 200gb 7200rpm hdd

    it says it comes with a free-fall sensor

    can anyone explain what this does? thanks
     
  2. NAS Ghost

    NAS Ghost Notebook Deity

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    if i understand it correctly, its supposed to lock the hard drive when the laptop accelerates to a certain speed; this is to prevent data loss (if you were to drop it)
     
  3. Johnny T

    Johnny T Forum Moderator Super Moderator

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    The reader/writer head of the hard drive automatically ''parks'' at its original position to stop it form scratching the disc. :)
     
  4. toe4

    toe4 Notebook Geek

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    interesting.
    thanks for the info :)
     
  5. Smoothieboy

    Smoothieboy Notebook Consultant

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    I have this drive. Mine is a Seagate. You can check out the description of the free fall sensor on Seagate's website. By the way, the 200 GB 7200 rpm Seagate is a nice drive. Pretty quiet.
     
  6. hwaforumtk

    hwaforumtk Notebook Guru

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    Good thread I've been meaning to ask this as well since Dell mistakenly gave me a 160GB FFS 7200RPM drive instead of what I ordered (160GB 5200RPM).
     
  7. carljordan

    carljordan Newbie

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  8. Nalada

    Nalada Notebook Evangelist

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    I suspect the danger is that if you are using the computer on a train or something it might repeatedly mistake the swaying of the carriage for drops and keep interrupting the disk access by lifting the heads off the disk. Anyway, I probably would have gone for this shock protection if I could... but I guess it is only effective for a computer that is dropped while it is on. The heads are probably parked anyway for a computer that is in standby or off... so the benefit may not be as great as it might first sound.
     
  9. SteveJonesy

    SteveJonesy Notebook Evangelist

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    I would think it would need slightly more acceleration than just the side to side swaying of a train.
     
  10. PJ@y-Z

    PJ@y-Z Notebook Evangelist

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    But it do this work randomly :confused:

    I've Seagate Momentus 120GB SATAII 7200RPM 8MB (ST9120823AS) :rolleyes:
     
  11. praneeth

    praneeth Sanath Jaya Suriya!!!

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    This is the drive that makes little clicking noises btw... hmmm also gets pretty hot

    the free fall sensor detects when the drive is in "free fall"
     
  12. PJ@y-Z

    PJ@y-Z Notebook Evangelist

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    Clicking ?? :(
     
  13. DRTH_STi

    DRTH_STi can't.stop.buying.laptops

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    only problem I see with this drive might be that when you do drop it and if the laptop does break somehow, but it does not look broken physically on the ouside.... and you wan tto get it repaired under warranty, that warranty won't repair it because they know it was dropped! I hope it doesn't retain records of free falls or anything like that.....or whether it stays in park position after a free fall....

    can anybody coment on this?

    I mean we've all dropped our laptops and messed them up without damaging the outside...they are very fragile...and I would sure like to have somebody repair it without telling me I broke it because they KNOW I dropped it
     
  14. praneeth

    praneeth Sanath Jaya Suriya!!!

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    Several uses have commented on hearing little clicking noises from the 7200 rpm Seagate drive... (myself included)... not really loud enough to bother anyone though.
     
  15. Smoothieboy

    Smoothieboy Notebook Consultant

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    I've got the Seagate 200 GB 7200 rpm drive, and I don't hear any clicking. It's a fairly quiet drive. My Thinkpad X60 has an active protection system for the hard drive which parks the heads when it detects sudden movement. The software can be adjusted for sensitivity and will ignore repetitive motions such as on a train.
     
  16. manzi

    manzi Notebook Evangelist

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    I have a seagate 5400rpm hdd and it clicks when in high performance mode.
     
  17. ifti

    ifti Undiscovered

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    I have a Hitahci drive in my D620 at work - the clicking noise is quite apparent.

    I have 2 Seagate Momentus drives in my M1730 in RAID 0 - the main reason I sold the Hitachi that came with the laptop, even thought it was also a 200GB 7200rpm, and purchased 2 Seagates (200gb at 7200rpm) is because Seagates do not have the clicking. They are completely quiet, and run cooler. Its the Hitachi's that have the clicking. Both my Seagates are in high performance mode - still no 'clicking'.

    Im an IT Network Manager, and I always recommend Seagate drives for notebooks. Most, if not all, of the 7200rpm drives have the free fall sensor, but their reliability and quietness makes them the best in the market IMO.
     
  18. msjaneoly

    msjaneoly Notebook Evangelist

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    The ones I have don't click but do run hot I noticed.
     
  19. galoisien

    galoisien Notebook Enthusiast

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    Does it really do it based on acceleration, or velocity? Because gravity is only 9.8 m / s^2 .... side to side swaying of the train can be more than a g in some cases. (Small but really quick bumps.)
     
  20. deathstick

    deathstick Notebook Evangelist

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    I am extremely certain that there is some threshold height it must be "dropped" before the sensor parks the head.
     
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