Reference Topics
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• If the registry specifies
DISALLOW_BACKUPS_SPANNING_MEDIA
,
NetBackup does not span media. Here, the backup terminates abnormally
when the end of media is reached and the operation is rescheduled
according to the Schedule Backup Attempts global attribute.
When an end of media is encountered on a standalone drive that uses a gravity
feed stacker (a stacker not controlled by software), you can have NetBackup
continue on the next volume loaded by the stacker, rather than looking for
another drive. To do this, add the
MEDIA_REQUEST_DELAY
option in the
registry. This option specifies a number of seconds for NetBackup to pause
before looking for another drive.
Keeping Standalone Drives in the Ready State
To leave standalone drives in a ready condition after a backup completes,
create an empty file named
NO_STANDALONE_UNLOAD
in the
install_path
\NetBackup\Volmgr
directory
When NetBackup detects the presence of this file, it prevents Media Manager
from ejecting the tape after an operation completes. The tape does eject if end-
of media (EOM) is reached.
It is possible for more than one standalone drive to be ready and contain
suitable media. If that occurs, drive selection occurs in logical drive index
number order. For example, if drives 2 and 3 are the same type and both
contain suitable media, NetBackup selects drive 2.
Media Format
NetBackup writes to media in a format that allows position to be verified
before appending new backups. The format for tape media differ slightly due
to characteristics of the media itself.
To determine the contents of tape or optical media, use the Media Contents
report.
Non-QIC Tape Format
For all tape media except QIC, the format for backups that are not multiplexed
is:
MH * BH Image * BH Image * BH Image * EH *
NetBackup 3.2 System Administrator's Guide for Windows NT
NetBackup 3.2 System Administrator's Guide for Windows NT