- Hercules DSORG=PS retrieval command
[-debug] [-expert] [-ascii] image
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.
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.
specifies the Hercules CKD/CCKD DASD filename (sometimes referred to as the DASD
dataset name of the file to retrieve. Case insensitive, converted to upper case
for searching VTOC on image DASD volume.
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.
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.
All expert mode operands are considered to be experimental.
dasdseq [-debug] [-expert] [-ascii] image [sf=shadow] [attr] filespec
Additional debug options are displayed. Specifying -debug will (eventually)
display dataset extent information.
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
composed of the following sub-operands, in the following order: heads, abs,
defines # tracks per cylinder on device; xx = decimal number of heads per
cylinder on device
-abs indicates the beginning of each extent's location in terms of absolute dasd
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.
will be the filename of the output file in the current directory; output
filename in the same case as the command line filename.
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
- dasdpdsu for DSORG=PO datasets
- cckd(4) for CCKD DASD
- http://www.hercules-390.org/cckddasd.html which
- the Hercules CCKD DASD facility.
- http://www.hercules-390.org/ the Hercules emulator
2003-03-10 originally written by James M. Morrison