NAME

       dasdseq - Hercules DSORG=PS retrieval command

SYNOPSIS

       dasdseq [options...] image [sf=shadow] filespec
       dasdseq [-debug] [-expert] [-ascii] image [sf=shadow] [attr] filespec [debugopts] [ascii]

DESCRIPTION

       Hercules command to retrieve a DSORG=PS (sequential) dataset from CKD/CCKD DASD.  The dataset is presumed
       to be encoded in EBCDIC.  The second form of the command is for 'expert  mode'  users,  and  allows  more
       advanced access to data on the DASD image.

OPTIONS

       The  following  options are used to specify dasdseq behavior.  Surround each option by blank(s).  Options
       are divided into three categories: required, optional, and expert mode operands.

Required operands

   image
       specifies the Hercules CKD/CCKD DASD filename (sometimes referred to as the DASD image file)

   filespec
       dataset name of the file to retrieve.  Case insensitive, converted to upper case for  searching  VTOC  on
       image DASD volume.

Optional operands

   sf=shadow
       For  CCKD images which also use shadow files, specifies the [path/]filename of the shadow file.  Note the
       sf=, which must be present for this option.

   -ascii
       convert the output file to ASCII (from EBCDIC).  Additionally, trailing blanks are trimmed.  The  'ascii'
       option (no leading dash) is deprecated, and may be removed in a future release.

Expert mode operands

       All expert mode operands are considered to be experimental.

        dasdseq [-debug] [-expert] [-ascii] image [sf=shadow] [attr] filespec [debugopts]

   -debug
       Additional  debug  options  are  displayed.   Specifying  -debug will (eventually) display dataset extent
       information.

   attr
       dataset attributes (only useful with -abs)

       [-recfm fb] [-lrecl aa]

       -recfm designates RECFM, reserved for future support

       fb - fixed, blocked (only RECFM currently supported)

       -lrecl designates dataset LRECL

       aa - decimal logical record length (default 80)

       Blocksize need not be specified; dasdseq handles whatever block size comes off the volume.

   filespec
       composed of the following sub-operands, in the following order: heads, abs, filename.

   -heads xx
       defines # tracks per cylinder on device; xx = decimal number of heads per cylinder on device

   -abs cc hh tt [...] [-abs cc hh tt]
       -abs indicates the beginning of each extent's location in terms of absolute dasd image location.

       cc - decimal cylinder number (relative zero)

       hh - decimal head number (relative zero)

       tt - decimal number of tracks in extent

       When -abs is specified, each -abs group specifies one dataset extent.  For  multi-extent  datasets,  -abs
       groups  may  be  repeated as needed, in the order in which the dataset's extents occur.  A maximum of 123
       extents are supported.  With -abs, no VTOC structure is implied; a F1 DSCB will not be  sought.   Dasdseq
       will  frequently  report  'track not found in extent table' (along with a message from fbcopy about rc -1
       from convert_tt) due to potentially missing EOF markers in the extent, and the  fact  that  the  F1  DSCB
       DS1LSTAR  field is not valid.  Check your output file before you panic.  Fbcopy -abs ignores EOF, in case
       you are attempting to recovery PDS member(s) from a damaged dasd volume, preferring  to  wait  until  all
       tracks  in  the extent have been processed.  Tracks containing PDS members may have more than one EOF per
       track.  Expect a lot of associated manual effort with -abs.

       When -abs is -not- specified, filename specifies the MVS DSORG=PS dataset on the volume.  The dasd  image
       volume containing the dataset must have a valid VTOC structure, and a F1 DSCB describing the dataset.

   filename
       will be the filename of the output file in the current directory; output filename in the same case as the
       command line filename.

   debugopts
       Produces debugging output, refer to the source code.

       verbose [x [y [z]]]

       verbose   debug output level (default = 0 when not specified).  Higher numbers produce more output.

       x  main program (default = 1 when verbose specified)

       y  copyfile + showf1

       z  dasdutil

SEE ALSO

       dasdpdsu for DSORG=PO datasets

       cckd(4) for CCKD DASD

       http://www.hercules-390.org/cckddasd.html which describes
              the Hercules CCKD DASD facility.

       http://www.hercules-390.org/ the Hercules emulator homepage.

HISTORY

       2003-03-10 originally written by James M. Morrison

                                                   2003-03-10                                         dasdseq(1)