fdflush - force floppy disk drive to detect disk change

       Bruce Perens Bruce@Pixar.com.

Debian                                          Debian Utilities                                      FDFLUSH(8)

       They're in your hardware.  Try swapping in another floppy drive to see if this problem goes away.

Fdflush  is a band-aid for a common PC hardware problem. Many PC floppy disk drives can't detect when the
       disk has been changed. The symptom of this problem is that  when  a  disk  is  changed,  the  drive  will
       continue to read buffered data from the previous disk rather than new data from the disk presently in the
       drive.  Running fdflush makes the system believe the disk-change switch has been actuated, and the system
       discards the buffered blocks in response to this information.  If you have one of  these  slightly-broken
       disk drives, you'll have to run fdflush every time you change a disk.

       The  kernel  uses two different ioctl commands to flush buffers. One's generic (BLKFLSBUF), one's floppy-
       specific (FDFLUSH).  fdflush calls both, and only reports an error if noth fail.

       Zero: success, one: ioctl error, two: inability to open the floppy (or other) device, three: usage error.

/dev/fdN  floppy disk device.

       fdflush - force floppy disk drive to detect disk change

device The name of the floppy disk device, in the form /dev/fd1.  The default is /dev/fd0.

fdflush [device]