System Generation Manual for G-Series RVUs

Using Preprocessing Commands
System Generation Manual for G-Series RVUs—523407-001
3-10
PARAM EXTENTSIZE
NRZI | 800
specifies the nonreturn-to-zero tape formatting standard, equivalent to a recording
density of 800 bits/inch.
PE | 1600
specifies the phase-encoded tape formatting standard, equivalent to a recording
density of 1600 bits/inch.
GCR | 6250
specifies the group-code recording tape formatting standard, equivalent to a
recording density of 6250 bits/inch.
Example
To tell SYSGENR that the SIT tape you wish to create must be recorded at 1600
bits/inch, enter the following command:
> PARAM DENSITY 1600
PARAM EXTENTSIZE
You can use this PARAM to specify the extent size for the SYSGENA work file. This
file becomes the OSIMAGE file in the new operating system. The syntax is shown
below.
extentsize
specifies the number of pages to be allocated for both the primary and secondary
extent sizes of the SYSGENA work file. The value must be at least 100. The
default is 200 pages. SYSGENR automatically allocates more extents, if needed,
so this PARAM is seldom used. If you specify an extent size that exceeds
available disk space, you receive file-system error 43 (unable to obtain disk space).
If this error occurs, decrease the extent size.
Example
To specify an extent size of 150 to the SYSGENA work file, enter the following
command:
> PARAM EXTENTSIZE 150
PARAM EXTENTSIZE { extentsize }