The Question is:
what's the meaning of FILE_ID
what does each number describe?
where can I get more info about that?
The Answer is :
The File Identification (FID) value is a value assigned to each
file on a disk volume. The value is intended to be unique across
all files on a volume, and is further intended to be relatively
unique across the life of the disk volume. Effectively, the FID
is a storage address for the meta information for the file.
Details on the internal organization of the FID and on the general
(low-level) operations and interfaces for the file system processing
code -- the XQP -- are included in the OpenVMS I/O User's Reference
Manual, part of the OpenVMS documentation set. Please see the section
on the ACP-QIO interface, and specifically the information on the File
Information Block (FIB) data structure. Also please see the index of
the OpenVMS System Manager's Manual for details on the disk structure
-- this manual includes a section describing the FID.
To find topics of interest in the OpenVMS documentation, please first
familiarize yourself with the OpenVMS Master Index -- in this case,
the Master Index contains references to "File identification", which
will point to the documentation.