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Thread: Music skips WITH foam shock absorbers, but does not when firmly mounted

  1. #1
    FLAC
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    Music skips WITH foam shock absorbers, but does not when firmly mounted

    Hi.
    Ok so I had a carputer installed like a two months ago and it was working perfectly. I had to take it out for a month to do some maintenance and didnt get a chance to put it in again up until a few days ago.

    Now the weird thing is, my music will skip if I hit some fair sized bumps. I am pretty sure this is a hard drive related issue. In fact, I was booting up my computer once, hit a bump, and my computer froze on the Windows XP loading screen. My hard drives are mounted inside a standard ATX case. I have small pieces of foam which I have put in between my two hard drives, and the case as shock absorbers. I also have a piece of foam which I put between my computer case, and trunk in which my case sits on. The case is mounted in such a way that my hard drive platters rotate in a direction parallel to the direction of rotation of my car's wheels.

    Now, with this configuration, my music will skip if I hit bumps. So I then decided remove the foam piece which I put in between the case, and the trunk. I am not sure if my music skipping problem has ceased completely, but I sure did not hear any skip when I drove with this configuration. I dont know if it was due to my slower driving, or the removal of the piece of foam. So does anyone have any theories on why this happened?

    Also, to prevent the possibility of future hard drive read errors, is there some sort of parameter that I can change to increase the hard drive buffer or something? With iPods, the iPod reads the file from the harddrive, then puts it in its ram and then the player plays the song from the ram, and not directly from the hard drive. Therefore, for the iPod, this ram acts like a sort of buffer. I am using Winamp, and I am guessing that it does not buffer data into ram in such a manner. Is there some way to make Winamp have a cache/buffer, or something?

  2. #2
    Maximum Bitrate v8 scimitar's Avatar
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    My hard drive is just bolted in solid and the case is in solid with no shock mountings, the drive is also laying flat and it has never skipped in nearly a year. That's with 40 profile tyres and rubbish pot holed UK roads.
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    Neither darque nor pervert DarquePervert's Avatar
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    I think the threat title contains the solution....
    Have you looked in the FAQ yet?
    How about the Wiki?



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  4. #4
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    I would think the use of foam would cause the bumps to be amplified. Basically allows the box to "bounce" more.

  5. #5
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by mike_b49431 View Post
    I would think the use of foam would cause the bumps to be amplified. Basically allows the box to "bounce" more.
    DING DING DING DING!
    Give that poster a cookie!

    1) Your car has a suspension system that will minimize the impacts of any jolts that could affect your hardware.

    2) The force of impact that would be necessary to damage the HDD would destroy the vehicle and likely kill driver & passengers.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  6. #6
    Variable Bitrate portabuddy's Avatar
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    unless you throw music into the equation. a sub will cause your HDD to skip alot more then the road will, in which case you just move your carputer somewhere else. i dont know if its true but i heard that if you mount the harddrive parallel to the road it wont skip because the electromagnet that causes the reading head to swing back and forth is stronger the the one that keep the distance away from the reading surface.
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  7. #7
    Maximum Bitrate seanz0rz's Avatar
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    i have mine mounted on memory foam in my truck. i see ALOT of offroad, mostly bumpy till i get to the challenging rock crawling stuff i love so much.

    on the memory foam it doesnt bounce, just isolates it from the vehicle. so far ive had zero problems with this setup, so i shall keep it.
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    I just thought I would give an update on my problem. When I said I didnt get any skips with no foam, I guess I kind of lied. A few days later after driving on some nasty bumps (computer firmly mounted, no foam), the music DID in fact, skip.

    My solution was to use a different type of foam setup. I actually found a cross section of the padding they use on mattresses (it was a demo for a type of mattress). This setup proved to be the best so far.

  9. #9
    FLAC Mastero's Avatar
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    Hello guys,

    HDD issue has been solved earlier..

    Its the way the HDD is mounted ... if its mounted flat then foam, rubber or any other material will just amplify the bump, causing ur HDD to die in time...

    Best solution is to mount it standing.

    Reason is the HDD head is always moving inside so any bump will keep the head in its own motion. Straight hdd head will jumps with the bump (gravity plays a good role here) and thus skipping a beat and hitting the HDD inner plate (@5400 rpm) causing a DEAD Hdd sooner or later.

    Its basiclly simple let the HDD head move with the car bumps other than against it.

    Hope it helps

    Mastero

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    High Voltage blk02si's Avatar
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    Quote Originally Posted by v8 scimitar View Post
    My hard drive is just bolted in solid and the case is in solid with no shock mountings, the drive is also laying flat and it has never skipped in nearly a year. That's with 40 profile tyres and rubbish pot holed UK roads.
    This is how I have mine mounted also, solid mounted on a soild mount chassis, laying flat. No problems for me in over a year and I live in michigan, we have the worst roads in the country plus I drive FAST. If you mount it standing up (as in the last post) the arm can bounce up and down causing read failures. Mounted flat, the arm cannot move up and down because of how the harddrive is built. The arm ony moves back and forth. As far as the arm hitting the platter flat mounted, you would need a serious shock for that to happen, like dropping it off a building or something. Road bumps are not enough to bend the arm into the platters. Road bumps are however enough to move the arm on its sweep axis if the drive is mounted upright.
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