dskdump - Sector-level copy from one floppy or image file to another

       John Elliott <seasip.webmaster@gmail.com>.

Version 1.5.9                                   17 September 2018                                     dskdump(1)

       Dskdump copies floppy discs or images, optionally converting image types.   Unlike  dsktrans(1),dskdump
       can handle discs with different numbers or sizes of sector on different tracks.

       dskdump - Sector-level copy from one floppy or image file to another

-itypeTYPE
              Determines which driver is to be used to read from the source disc.

              auto    Select according to the disc image file. This is the default.

              dsk     Use the DSK (CPCEmu format) image driver.

              edsk    Use the extended version of the DSK format.

              floppy  Use the floppy driver.

              myz80   Use the hard disk (MYZ80 format) image driver.  (This format cannot be autodetected.)

              cfi     Use the CFI (DOS fdcopy format) image driver.  (This format cannot be autodetected.)

              apridisk
                      Use the ApriDisk image driver (from the utility of the same name).  (This format cannot be
                      autodetected.)

              raw     Use the raw driver.

       -otypeTYPE
              Determines  which  driver  is  to be used to write to the destination disc. The drivers are as for
              -itype.

       -icompCOMP
              Select the compression method used on the source disc image file (has no  effect  when  reading  a
              floppy disc).

              auto    Detect from the first few bytes of the file. This is the default.

              sq      Huffman coded (SQ / USQ).

              gz      Gzipped (gzip / gunzip).

              bz2     Burrows-Wheeler compressed (bzip2 / bunzip2).

       -ocompCOMP
              Select  the  compression  to be used on output. Compression methods are as for -icomp, except that
              bz2 cannot be used.

       -isideSIDE
              Determines which side (0 or 1) of the source disc is to be read from.

       -osideSIDE
              Determines which side (0 or 1) of the destination disc is to be written to.

       -idstep
              Double-step the source drive (used to read 360k discs in 1.2Mb  drives).  Only  supported  by  the
              Linux floppy driver.

       -odstep
              Double-step  the  destination drive (used to write 360k discs in 1.2Mb drives).  Only supported by
              the Linux floppy driver.

       -retryCOUNT
              Set the number of times to attempt a read/write/format in case of error.

       -formatFMT
              Do not autodetect the disc format; use the named format.  dskdump does not make extensive  use  of
              the disc format; it is chiefly used to provide a guess at the number of tracks to dump.

       -firstCYL
              Start copying at the specified cylinder. Cylinders prior to this will not be formatted or written.

       -lastCYL
              Copy up to and including the specified cylinder.

       -odstep
              Double-step  the  destination drive (used to write 360k discs in 1.2Mb drives).  Only supported by
              the Linux floppy driver.

dsktrans(1)

dskdump  [-itypeTYPE]  [-otypeTYPE] [-isideSIDE] [-osideSIDE] [-icompCOMP] [-ocompCOMP] [-idstep]
       [-odstep] [-retryCOUNT] [-formatFMT] [-firstCYLINDER] [-lastCYLINDER] INPUT-IMAGEOUTPUT-IMAGE