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(fdutils.info)DCL configuration

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Configuration of the disk change line
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`--broken_dcl'
     Assumes that the disk change line of the drive is broken.  If this
     is set, disk changes are assumed to happen whenever the device
     node is first opened. The physical disk change line is ignored.

     This option should be used if disk changes are either not detected
     at all, or if disk changes are detected when the disk was actually
     not changed.  If this option fixes the problem, I'd recommend that
     you try to trace the root cause of the problem.  Indeed, this
     options results in reduced performance due to spurious cache
     flushes.

     The following hardware problems may lead to a bad disk change line:
        * If the floppy cable is not inserted straight, or if it is
          kinked, the disk change line is likely to suffer, as it is on
          the edge of the cable.  Gently press on both connectors of
          the cable (drive and controller) to insure that all wires
          make contact.  Visually inspect the cable, and if it shows
          obvious traces of damage, get a new one.

        * On some drives, the locations disk change line may be chosen
          by jumper. Make sure that your floppy controller and your
          drive agree on which line is the disk change line.

        * Some older drives (mostly double density 5 1/4 drives) don't
          have a disk change line.  In this case, you have no choice
          other than to leave the `broken_dcl' option on.

`--working_dcl'
     Assumes that the disk change line works all right. Switching from
     broken to working may lead to unexpected results after the first
     disk change.

`--inverted_dcl'
     Assumes that this disk drive uses an inverted disk change line.
     Apparently this is the case for IBM thinkpads.

`--no_inverted_dcl'
     Assumes that this drive follows the standard convention for the
     disk change line.

`--noisy_dcl_clear'
     Switches off silent disk change line clearing for this drive.