HP BACKCOPY User Manual

STARTSTOP | STREAM
specifies the tape mode of the destination drive. It applies only to tape units that support
streaming.
STARTSTOP
Tape speed is 50 ips (inches per second). Tape density is 12000 bpi (bits per inch). This
mode writes one record to the tape at a time.
STREAM
Tape speed is 75 ips. Tape density is 12000 bpi. This mode writes one block to tape at
a time.
NOTE: You cannot use the DENSITY and TAPEMODE in the same BACKCOPY command.
VERIFYREEL
directs BACKCOPY to verify each reel for data integrity after the reel is written.
Guidelines
Consider these guidelines when using BACKCOPY:
• 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.
• BACKCOPY automatically generates tapes in tape format 3 if any of these are true:
The duplicate tape is a labeled tape (dest-tape is a DEFINE name).◦
◦ You are making two copies (by specifying two dest-tape names).
◦ You specify the ARCHIVEFORMAT option.
Otherwise, BACKCOPY creates a duplicate tape in the same format as the original.
• BACKCOPY can create tapes in formats 0, 1, 2, or 3.
• Only versions C00 (and later) of RESTORE can read tapes generated in tape format 3 (archive
format).
• BACKCOPY supports labeled-tape processing in the same way as BACKUP. For more
information, see Backing Up With Labeled Tapes (page 77).
• A duplicate tape generated with BACKCOPY is not the same as parallel tape copies generated
with BACKUP:
◦ When parallel copies are made with BACKUP, both copies contain exactly the same
amount of information on each reel. You need to 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 process.
◦ When two copies are made with BACKCOPY, the amount of information on each tape
reel can vary between the copies. You can 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.
◦ When you make a single copy of a tape using BACKCOPY, the BACKCOPY tape might
contain a different amount of data from the BACKUP source tape. When you make two
copies using BACKCOPY, these two copies contain the same amount of data and are
therefore interchangeable. However, these copies might contain a different amount of
data from the BACKUP source tape.
36 BACKCOPY

HP BACKCOPY Specifications

General

Brand	HP
Model	BACKCOPY
Category	Software
Language	English