Ref: 11640073
Title: What Happens When 3+Backup is Accessed
Date: 4/20/90

Copyright 3Com Corporation, 1991.  All rights reserved.

3+Backup is activated from the 3BMEN screen or with 3B commands.
To reach 3BMEN, follow these steps:

1.  Login as Admin user.

2.  Link to the server containing the tape unit and 3+Backup.
For example:  3F LINK \\servera\3BACKUP d:

3.  Change to drive D:

    d: <cr>

4.  Run 3BMEN.

    3BMEN <cr>

    The 3+Backup menu appears on the workstation screen.

Once you have actually typed 3BMEN and pressed Enter, the
following process is occurring:

3+Backup needs to talk with the workstation that initiated the
backup command.  3+Backup also needs to talk to the tape unit, to
the server on which 3+Backup is running, and to the server that
is being backed up.  The detailed steps are as follows:

1.  3+Backup commands are issued from the workstation.

2.  3+Share on Server2 receives the commands from the MINDS
drivers.

3.  3+Backup piggybacks onto 3+Share.  3+Share has a pointer (INT
2F chain or a bogus Server Message Block control using BKP
instead of SMB in the header that goes through the INT 2F
chain) that says "This is not mine...send it on."  The
information is then passed onto 3+Backup.

4.  3+Backup responds and issues a response packet back through
3+Share.

5.  3+Backup backs up one partition at a time.

6.  3+Backup uses three PRO.SYS processes, one each for file I/O,
TAPE, and AUTOTIMS.  The AUTOTIMS process wakes up
periodically and reads and handles the AUTOTIMS file.  The
file I/O process handles the main routine of the backup and
restore operations.  The TAPE process handles tape streaming
during backup.  It is used only for backups, not restores or
tape directories.  The file I/O and AUTOTIMS processes have a
priority of 2.  The TAPE process has a priority of 3, the highest
priority allowed.
