DEC MicroVAX 3100 Owner's Manual page 163

7. The procedure displays a list of the local devices on your system, for
example:
Available device MKA500:
Available device DKA100:
device type TK50
device type RZ23
8. When standalone BACKUP finishes booting, it displays an
identification message followed by the dollar-sign prompt
($):
%BACKUP-I-IDENT, stand-alone BACKUP V5.2; the date is
19-APR-1990 13:00:00.00
$
9. Remove the tape cartridge containing standalone BACKUP from the
tape cartridge drive.
To back up the system disk, see Section G.2.1.
To restore the system disk, see Section G.2.2
G.2 Backing Up the System Disk
There are several reasons to back up a system disk:
• In case a problem occurs during a VMS upgrade or update, or during
the installation of other software products. Before you attempt any of
these procedures, you should back up the system disk. If a problem
occurs, you can restore the backup copy of the system disk.
• To prevent loss of system files if they are deleted accidentally. After you
install or upgrade the VMS operating system, or any other software
products, you should back up the system disk. If a system file is deleted
and renders the system disk inoperable, you can restore the backup copy
and continue to use the system.
• In case the system disk malfunctions. If you have a backup copy of
the VMS operating system, you can restore it to a functioning disk and
continue to use the system.
• To eliminate disk fragmentation. Fragmentation happens when files
are not stored contiguously on the disk. Back up the system disk to a
tape cartridge, diskettes, or another disk. Then restore the files to the
original system disk. The BACKUP command creates a copy on which
files are stored contiguously.
G-6
MicroVAX 3100 and VAXserver 3100 Owner's Manual