RUN iT!! !£tiQ1! Rewind tape and unload Write n tape marks TAPE Q2tiQ!!§: If conflicting options are specifiedr the last one entered is in
effect. WTr! writes a tape mark on the tape after each file is dumped.
writes a tape mark after each file is dumped, then backspaces
over the tape mark so that subsequent files written on the
tape are not separated by tape marks. NOPRINT does not spool the list of files dumped r loaded r scanned r or
skipped to the printer.
PRINT DISK EOT EaF n 1
TAPn 7TRACK
qTRACK
spools the list of files dumped r loaded r scanned r or skipped
to the printer.
displays a list of files dumped r loaded r scanned r or skipped
at the terminal.
creates a disk file containing the list of files dumped r loaded r scanned, or skipped. The disk file has the file
identification of TAPE A5.
reads the tape until an end-of-tape indication is received.
reads the tape through a maximum of !! tape marks. default is EOF 1; The
specifies the symbolic tape identification (TAPn) or the
actual device address of the tape to be read from or written
to where n is 1, 2, 3
r or 4. The is TAPl or 181.
The unit specified by cuu must previously have been attached
to vour CMS virtual machine before any tape I/O operation can
be attempted. Only symbolic names TAP1 through TAP4 and
virtual device addresses 181 through 184 are supported.
specifies a 7-track tape. Odd parity, data convert on, translate off are assumed unless TRTCH is specified.
specifies a 9-track tape.
DEN den is the tape density where den is 200, 556, 800,. 1600 r or 6250. If 200 or 556 is specifiedr 7TRACK is assumed. If 1600 or 6250 is specified, 9TRACK is assumed; if 800 is
specified, 9TRACK is assumed unless 7TRACK is specified. In
the case of either 800/1600 or 1600/6250 dual-density drives r 1600 is the default if the 9TRACK option is specified. If
neither the 9TRACK option nor the DEN option is specifiedr
the drive operates at whatever bpi the tape drive was last
set.
TRTCH a is the tape recording technique for 7-track tape. If TRTCH
is specifiedr 7TRACK is assumed. One of the following must
be specified as "a": Section 2. CMS Commands 189

g o Odd parity, data convert off, translate off OC Odd parity, data convert on, translate off OT Odd parity, data convert off, translate on
E Even parity, data convert off, translate off
ET Even parity, data convert off, translate on
1. Tape records written by the CMS TAPE DUMP command are 805 bytes
long. The first character is a binary 2 (X'02'), followed by the
characters CMS and an EBCDIC blank (X'40't, followed by 800 bytes
of file data packed without regard for logical record length. If a
null block is dumped, the character "0" replaces the blank after CMS. This causes subsequent loading of null blocks to be ignored.
In the final record, the character N replaces the blank after CMS, and the data area contains CMS file directory information.
2. If a tape file contains a large number of CMS files that vould not
fit on disk, the tape load operation may terminate if there is not
enough disk space to hold the files. To prevent this, when you
dump the files, separate logical files by tape marks, then forward
space to the appropriate file.
3. Because the CMS file directory is the last record of the file, the TAPE command creates a separate vorkfile so that backspacing and
rereading can be avoided when the disk file is built. If the load
criteria is not satisfied, the vorkfile is erased; if it is
satisfied, the workfile is renamed. This workfile is named TAPE CMSUT1, which may exist if a previous TAPE command has abnormally
terminated. If the work file is accidentally dumped to tape and
subsequently loaded, it appears on your disk as TAPE CMSUT2. 4. It is possible to run a tape off the reel in at least one
situation. If you specify EOF nand n is greater than the number
of tape marks on the tape, the tape will run off the reel.
5. The RUN option (rewind and unload) indicates completion before the
physical operation is completed. Thus, a subsequent operation to
the same physical device may encounter a device busy situation.
6. For more information on tape file handling, see the DMSTPE701I NULL FILE A final record was encountered and no prior records vere read in a TAPE LOAD operation. No file is created on disk. 190 IBM VM/370 CMS Command and Macro Reference