z/VM: CP Commands and Utilities Reference - z/VM - IBM

CPFMTXA
-END
is the last of the range of cylinders or pages to be formatted. It is a 1-digit to
5-digit decimal integer (1-digit to 9-digit for fixed-block devices) and must be
within the size of the virtual device. If specified, eext must be equal to or
greater than sext. Specify END to format the entire virtual device, starting with
the sext.
An alternative to using a dash (-) to separate sext from eext or END is one or
more blanks. For example, you may enter PERM 0 20 instead of PERM 0-20.
If you do not specify eext or END, the default is one cylinder or page.
.num
.END
is a 1-digit to 5-digit decimal integer (1-digit to 9-digit decimal integer for
fixed-block devices) designating the number of cylinders or pages being
formatted. No blanks are allowed between the sext and .num or .END. The num
parameter must not be zero. The sum of sext and num must not exceed the
size of the virtual device. Specify END to format all cylinders or pages on the
virtual device, starting with sext. If you do not specify num or END, the default
is one cylinder or page.
Format
indicates that you want to format a volume
Allocate
indicates that you only want to reallocate a previously formatted volume.
Label
indicates that you only want to change the volume identification label. The
volume must already be formatted. Only the volume identifier is changed; other
information on the label record of the DASD remains unchanged.
Note: If you do not specify any of the sext, LABEL, or ALLOCATE options, the
default is to format, allocate, and label the entire device.
Changing the Allocation Map
Whenever you format a disk or specify the ALLOCATE option, the current allocation
of the disk is displayed as follows:
CYLINDER ALLOCATION CURRENTLY IS AS FOLLOWS:
TYPE START END TOTAL
---- ----- --- ----type
.
nnnnn nnnnn nnnnn
type nnnnn nnnnn nnnnn
For fixed-block devices the current allocation will appear as:
PAGE ALLOCATION CURRENTLY IS AS FOLLOWS:
TYPE START END TOTAL
---- ----- --- ----type
.
nnnnnnnnn nnnnnnnnn nnnnnnnnn
type nnnnnnnnn nnnnnnnnn nnnnnnnnn
1782 z/VM: CP Commands and Utilities Reference
type
is normally DRCT, PAGE, PARM, PERM, SPOL, or TDSK.
BAD
indicates that the disk has not been formatted by CPFMTXA, and you should
consider reformatting the entire disk, using CPFMTXA.