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.
-abs indicates the beginning of each extents 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 datasets 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.