DDR INPUT indicates that the device described is an input device. OUTPUT indicates that the device described is an output device.
cuu
type If the output device is a DASD device and DDR is running
under CMS, the device is released using the CMS RELEASE command function and DDR processing continues.
is the unit address of the device.
is the device type (2314, 2319, 3330, 3330-1" 3340-35, 3340-70, 3350, 2305-1, 2305-2, 2400,. 2420, 3410, or 3420) (no
7-track support for any tape devices). Specify a 3340-70F as
a 3340-70, and a 3333 as a Specify a 3350 that is in 3330-1 or 3330-11 compatibility mode as a 3330 or 3330-11. Specify a 3344 as a 3340-70, and specify 3350 for a 3350
operating in native mode (as opposed to compatibility mode). The DASD Dump Restore (DDR) program, executing in a
virtual machine, uses I/O DIAGNOSE 20 to perform I/O operations on tape and DASD devices. DDR under CMS requires
that the device type entered agree with the device type of the
real device as recognized by VM/370. If there is a conflict
with device types, the following message is issued: DMKDDR708E INVALID OPTION However, if DDR executes standalone in a virtual machine, DDR
uses DIAGNOSE 20 to perform the I/O operation if the device
types agree. If the device types do not agree, arror message DMKDDR708E is issued.
volser is the volume serial number of a DASD device. If the keyword "SCRATCH" is specified instead of the volume serial number, no
label verification is performed.
altape is the address of an alternate tape drive. If multiple reels of tape are required and "altape" is
not specified, DDR types the following at the end of the reel:
END OF VOLUME CIL xxx HD xxx, MOUNT NEXT TAPE After the new tape is mounted, DDR continues automatically. SKIP nn
o
forward spaces nn files on the tape. nn is any number
up to 255. The SKIP option is reset to zero after the
tape has been positioned.
r , MODE 162501 causes all output tapes that are opened for the first 116001 time and at the load point to be written or read in I 8001 the specified density. All subsequent tapes mounted
L J are also set to the specified density. If no mode REIJIND UNLOAD option is specified, then no mode set is performed and
the density setting remains as it previously was.
rewinds the tape at the end of a function.
rewinds and unloads the tape at the end of a function.
48 IBM VM/370 CMS Command and Macro Reference

LEAVE DDR
leaves the tape positioned at the end of the file at
the end of a function.
1. When the wronq input tape is mounted. the message is
displayed and the tape will rewind and unload regardless of options REiIND. UNLOAD, or LEAVE being specified.
2. If DDR is executed from CMS, failure to attach the tape drive or
the disk device (or both) to your virtual machine prior to invoking
the input/output statement causes the following response to be
displayed: INVALID INPUT OR OUTPUT DEFINITION Use the SYSPRINT control statement (in the standalone DDR virtual
machine only) to describe the printer that is to print data extents
specified by the PRINT statement. It also can print a map of the
cylinder extents from the DUMP, RESTORE, or COpy statement. If the SYSPRINT statement is not provided. the printer assignment defaults to OOE. ignores the SYSPRINT statement when you invoke DDR as a
command under CMS, and eMS always directs the output to OOE. The format
of the SYSPRINT control statement is:
r----------------------------------------------------------------------, , SYsprint, cuu , cuu specifies the unit address of the device. The function statements tell the DDR program what action to perform.
The function commands also describe the extents to be dumped. copied. or
restored. The format of the DUMP/COPY/RESTORE control statement is:
r----------------------------------------------------------------------, , , r l' , DUmp I Icyll [To] [cyl2 [Reorder] [To] [cyI3]] , , , COpy " CPvol " I REstore" ALL I I , I ,NUcleus I' , I L L----------------------------------------------------------------------J DUMP requests the program to move data from a access volume
onto a magnetic tape or tapes. The data is moved cylinder by
cylinder. Any number of cylinders may be moved. The format
of the resulting tape is: a volume header
describing the volumes.
record, consisting of data a track header record, consisting of a list of count
fields to restore the track. and the number of data records
written on tape. After the last count field the record
contains key and data records to fill the 4K buffer. Section 2. CMS Commands 49