CA Dynam for VSE User Guide

Using CA Dynam/T
For example, the following commands establish four data sets with the
appropriate recording densities:
DEFINE 'FILE ONE' NGEN=1 DEN=800
DEFINE 'FILE TWO' NGEN=1 DEN=1600
DEFINE 'FILE THREE' NGEN=1 DEN=6250
DEFINE 'FILE FOUR' NGEN=1 DEN=CART
Setting the Mode on Scratch Tapes
CA Dynam/T only selects a scratch tape on a drive capable of writing in the
desired mode when AVR is performed for output. If CA Dynam/T cannot find
one, it issues message CADT008D:
CADT008D MOUNT SCRATCH dtfname SYSnnn DSN=data-set-name OWNER=xx
MODE=xxxx SIZE=xx JOB=jobname
CADT008D MOUNT SCRATCH dtfname ON cuu DSN=data-set-name OWNER=xx
MODE=xxxx SIZE=xx JOB=jobname
You can reply with the responses mentioned in Answering Mount Messages.
When the message specifies a particular drive, CA Dynam/T verifies that the
requested mode can be written before making the assignment. You can
respond cuumm to override the requested mode for this version only. For
example, if you reply 280D0 to the MOUNT message above, CA Dynam/T
creates the tape on drive 280 in 6250 mode.
If no mode is specified for the data set, CA Dynam/T does not check or set the
mode. It uses the mode specified in the PUB for the device allocated (VSE
standard).
Setting the Mode for Uncontrolled Tape Files
You can also assign recording density in the following ways:
• For uncontrolled tape files in response to the CADT001D unassigned
output message; a response of cuumm sets the specified mode when the
assignment is made.
• In the file-ID field of the TLBL statement
Tape Cartridges
CA Dynam/T capabilities in utilizing tape cartridges enable it to do the
following:
• Stack nonstandard files and locate them.
• Free up the channel for other activity.
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