Disk And Tape Utilities Overview; Utility Descriptions; Backcopy; Disk And Tape Utilities And Their Associated Tasks - HP BACKCOPY Reference Manual

1 Disk and Tape Utilities Overview

This section briefly describes the disk and tape utilities of the NonStop operating system. The usage
scenarios of most of these utilities are defined clearly by their basic functions. For the BACKUP,
RESTORE, and BACKCOPY utilities, which have overlapping uses, this section also explains the
similarities and differences in their usage:
Topic

Utility Descriptions

Using BACKCOPY, BACKUP, and RESTORE
Using BACKUP and RESTORE With DSM/Tape Catalog
Throughout this manual, the term disk refers to both magnetic and optical disk for each utility,
except for DCOM and DSAP, which work only on magnetic disks. The term tape refers to magnetic
tape.
The two formats for disk files are:
A format 1 file is any file created on a system running an RVU preceding G06.00 or D46.00
or a file created on any more recent RVU that is smaller than 2 GB minus 1 MB.
A format 2 file is either a large format file or a file that can contain larger partitions than a
file created on RVUs preceding G06.00 or D46.00. A format 2 file can exceed the 2 GB
minus 1 MB size limit of a format 1 file.
For more information about handling format 1 and format 2 files, see the File Utility Program (FUP)
Reference Manual.
Utility Descriptions
Table 1 Disk and Tape Utilities and Their Associated Tasks
Task
Duplicate backup tapes
Back up files on disk to tape
Move file extents to gain more usable disk space
Analyze and generate reports on disk space usage
Compress or decompress files
Copy files on tape to disk

BACKCOPY

The BACKCOPY utility makes duplicates of any tape created using the file-mode feature of the
BACKUP utility. The BACKCOPY utility can create up to two duplicate tapes for archiving,
distribution, or disaster recovery. BACKCOPY can be used for migrating backups from or to
appendable pools. This also facilitates migrating backups to older RVUs.
24 Disk and Tape Utilities Overview
Page
(page 24)
(page 28)
(page 32)
Utility
BACKCOPY
BACKUP
DCOM
DSAP
PAK/UNPAK
RESTORE