TAL Programmer's Guide

Disk File Names
File Names and TACL Commands
E–2 096254 Tandem Computers Incorporated
Parts of a Disk File Name A disk file has a unique file name that consists of four parts, with each part separated
by a period:
A D-series node name or a C-series system name
A volume name
A subvolume name
A file ID
Here is an example of a disk file name:
\mynode.$myvol.mysubvol.myfile
You can name your own subvolumes and file IDs, but nodes (systems) and volumes
are named by the system manager.
All parts of the file name except the file ID are optional except as noted in the
following discussion. If you omit any part of the file name, the system uses values as
described in “Partial File Names” later in this appendix.
Node or System Name
The node or system name, such as \MYNODE, is the name of the node or system
where the file resides. If specified, the node or system name must begin with a
backslash (\) followed by one to seven alphanumeric characters. The character
following the backslash must be an alphabetic character.
Volume Name
The volume name, such as $MYVOL, is the name of the disk volume where the file
resides. If specified, the volume name must begin with a dollar sign ($), followed by
one to six or one to seven alphanumeric characters as follows. The character following
the dollar sign must be an alphabetic character.
On a D-series system, the volume name can contain one to seven alphanumeric
characters.
On a C-series system, the volume name can contain:
One to six alphanumeric characters if you include the system name
One to seven alphanumeric characters if you omit the system name
On a C-series system, if you specify the system name, you must also specify the
volume name. If you omit the system name, specifying the volume name is optional.
Subvolume Name
The subvolume name, such as MYSUBVOL, is the name of the set of files, on the disk
volume, within which the file resides. The subvolume name can contain from one to
eight alphanumeric characters, the first of which must be alphabetic.
On a D-series system, if you specify the volume name, you must also specify the
subvolume name. If you omit the volume name, specifying the subvolume name is
optional.