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Thread: Floppy drive clicking sound

  1. #1
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    Default Floppy drive clicking sound

    I read an article Here that explained the reason why FD drives make their
    famous sound: sound of re-calibration.

    Is this the only cause for FD drives to get noisy ?

    ziloo

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    Quote Originally Posted by ziloo View Post
    I read an article Here that explained the reason why FD drives make their
    famous sound: sound of re-calibration.
    The article applies to old Apple, Commodore etc. drives without a track 0 sensor, but not so much to PC drives unless there's a problem with the sensor.

    Any problem that prevents the carriage from moving when the stepper motor is trying to move it will make that noise, e.g. dried lubricant on the carriage rails. Another cause might be a problem with the stepper motor and/or driver that causes the stepper to vibrate instead of actually stepping.

    m

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    Some PC software issued the "recalibrate" command using the slowest possible step rate. This could make some drives sound like they'd been taken over by a nest of angry hornets.

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    I recall a DOS command-line program to choose the fastest step rate to make the drives "quieter". This worked somewhat, and I never had a read/write issue. If the faster step rates were supported and worked just fine, why did the IBM BIOS choose slower rates by default?
    Last edited by Trixter; November 9th, 2017 at 10:10 AM.
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    I suspect that the original 5150 BIOS was configured to work with the slowest of the 5.25" drives. To be sure, doing this will also allow operation with faster drives, so other than the noise, the impact is minimal. Stepping over a few tracks takes less time than a single disk revolution.

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    Herb Johnson has accumulated a wealth of information about floppy drives, and
    for posterity of this thread I will post it here:

    http://retrotechnology.net/herbs_stuff/drive.html#info

    ziloo

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    Some of it is from (modesty forbids).

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    Quote Originally Posted by Chuck(G) View Post
    Some of it is from (modesty forbids).
    oh! come on Chuck ......we are all ears

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    Quote Originally Posted by Chuck(G) View Post
    Some of it is from (modesty forbids).
    Even I made some modest contributions...

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    I found it!!! This is a very nice write-up about working with old diskettes
    from the one and only "mbbrutman":

    http://www.brutman.com/PCjr/diskette_handling.html

    ziloo

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