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Backing Up and Restoring Disk Information
source-tape
Name of the tape drive that reads the tape you are duplicating, or a TAPE DEFINE
name.
dest-tape
Name of the tape drive(s) where the duplicate tape(s) is written, or a TAPE DEFINE
name.
*.*.*
Specifies all files on the source tape. You cannot specify individual files.
command-option
A Backcopy command option:
Table 11-5. Backcopy Command Options
Option
ARCHIVEFORMAT Specifies the archive tape format (tape version 3)
DENSITY
LISTALL
NOUNLOADIN
NOUNLOADOUT
PAGELENGTH
TAPEMODE
VERIFYREEL
Backcopy copies all files. If Backcopy cannot read a file because of a parity or
checksum error, it displays an error message and the tape duplication fails.
A duplicate tape generated with Backcopy is different from a parallel tape copy
generated with Backup:
When parallel copies are made with Backup, both copies contain exactly the same
amount of information on each reel. You mount new tape reels for both copies at the
same time. Backup makes identical copies so that each reel of tape is
interchangeable with its corresponding copy during a Restore.
When you make a second copy with Backcopy, the amount of information on each
tape reel can vary between the copies. You mount a new tape whenever a drive
reaches the end of reel; you do not necessarily change tape reels for both copies at
the same time. The individual reels are not interchangeable; only the whole
duplicate tape set is interchangeable with the original set.
Function
Specifies the tape density in bits per inch (bpi)
Lists all files copied, including any files that cause errors
Causes the last source tape not to be unloaded
Causes the last destination tape (or tapes) not to be unloaded
Lets users specify between 20 and 100 lines per page to be displayed
on a utility listing (default value is 60)
Specifies the tape mode for streaming tape drives
Makes Backcopy verify each tape reel after the reel is written
Guardian User's Guide —425266-001
11 -24
Running Backcopy
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