System Generation Manual for G-Series RVUs

Running DSM/SCM and SYSGENR
System Generation Manual for G-Series RVUs—523407-001
4-10
Creating a System Image Tape (SIT)
BACKUP-option
is one of the following subset of options to the BACKUP program:
BLOCKSIZE n
DENSITY { 800 | NRZI}
{1600 | PE }
{6250 | GCR }
IGNORE
LISTALL
NOPROMPT
NOUNLOAD
OPEN
TAPEMODE { STARTSTOP | STREAM }
For a complete description of these BACKUP options, refer to the Guardian Disk
and Tape Utilities Reference Manual.
Using a BLOCKSIZE greater than the default of 2 speeds the tape-writing process
and produces a more compact tape. The optimum BLOCKSIZE for BACKUP is 28.
!
directs BACKUP to write one SIT and then stop. If you omit specifying the
exclamation point (!), BACKUP writes the SIT and then prompts you for the next
tape name and options.
If specified without a tape name or BACKUP option, ! indicates that you want
BACKUP to use your previous response to this question. After performing this
write request, SYSGENR prompts you again for the next tape name and options.
Examples
•
In the following example, BACKUP makes one SIT at the optimum block size on
$TAPE1 and terminates:
$TAPE1, BLOCKSIZE 28, LISTALL !
•
In the following example, BACKUP makes a SIT at a recording density of 6250
bits/inch on $TAPE4 and prompts again for the next tape name and options:
$TAPE4, DENSITY 6250, LISTALL