DEC 4000 Model 200 Operation Manual page 117

Available device MUA0:
Available device DIA0:
.
.
.
8. When standalone BACKUP finishes booting, it displays an identifica-
tion message followed by the dollar-sign prompt ($):
%BACKUP-I-IDENT, stand-alone BACKUP V5.4--n; the date is
19-APR-1991 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 C.2.
To restore the system disk, see Section C.3.
C.2 Backing Up the System Disk
The reasons to back up a system disk are:
• 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.
Digital recommends that you use standalone BACKUP, which uses a subset
of Backup utility qualifiers, to back up and restore the system disk. It is
especially important that you understand the functions of the /IMAGE and
/PHYSICAL qualifiers to the BACKUP command before using standalone
BACKUP. Table C–1 summarizes the standalone BACKUP qualifiers.
C–6 VAX 4000 Model 200 (BA430) Operation
device type TK70
device type RF31