IBM Professional Series User Manual page 236

fn [ft [fm]]
defines a subset of the files on the specified disk.
Only the specified files are included in the user file
directory and only those files can be read. An
asterisk coded in any of these fields indicates all
filenames, filetypes, or filemode numbers (except 0)
are to be included. (See Usage Notes 3 and 4.) To
specify a filemode use a letter and a number, for
example: B 1.
Options:
ERASE
specifies that you want to erase all of the files on the
specified disk. This option is only valid for
read/write disks.
Usage Notes:
1.
If
you have defined disk addresses 100, 101, and IDE in
the VM/PC configuration file, or if they are defined
before you IPL CMS, these disks are accessed as the S-,
A-, and Y -disks respectively. Following an IPL of CMS,
you must issue explicit ACCESS commands to access
other disks. Ordinarily, you have access only to files
with a filemode number of 2 on the system disk.
2. Associated with each CMS disk is a file directory, which
contains an entry for every CMS file on the disk. The
user file directory created in storage by the ACCESS
command contains entries for only those files that you
can reference.
If you use the CP LINK command to link to a new
minidisk, issue an ACCESS command each time. Do
this so that you obtain the appropriate file directory.
3. The filename, filetype, and filemode fields can only be
specified for disks that are accessed as read-only
extensions. For example:
access 195 b/a
*
assemble
Chapter 7. VM/PC Commands 7 -63