User`s guide

BACKUP
— Scans the output volume for bad blocks, since backup volumes must not
contain bad blocks. If BUP finds no bad blocks, it displays the message:
?BUP-I-No bad blocks detected
But if BUP finds a bad block on an output volume, BUP issues a fatal
error message and stops the backup operation:
?BUP-F-Bad blocks detected; use another volume
In this case, you must mount and initialize another volume.
If you are sure all the backup media contain no bad blocks, you can include
the /NOSCAN option in your BACKUP command to prevent a bad-block
scan of each backup media.
• For magtapes, the initialization procedure rewinds the magtape and writes
a volume and header label at the beginning of the magtape.
• For all backup volumes, BUP automatically prompts you for initializing each
subsequent backup volume, when you need more than one.
Once you have an initialized backup volume, you should not reinitialize it to
do further backup operations on that volume unless you want to delete backup
information already on the volume.
To return a BACKUP-initialized volume to an RT–11 structured volume for
use other than with the BACKUP command, initialize the volume, using the
INITIALIZE command.
The following command example shows the initialization of the backup volume
on DU1. The backup saveset WRK.BUP is created on that volume:
.BACKUP/INITIALIZE DL0:F*.FOR DU1:WRK
Mount output volume in DU1:; Continue? Y
?BUP-W-Not a BACKUP volume DU1:
DU1:/BUP Initialize; Are you sure? Y
?BUP-I-Bad block scan started
?BUP-I-No bad blocks detected
?BUP-I-Creating output volume 1
Files backup up:
DL0:FUNC1.FOR
DL0:FUNC2.FOR
?BUP-I-Backup operation is complete
.
/[NO]LOG
Displays a list of all the files affected by a BACKUP command operation as the
operation progresses, unless you specify /NOLOG. The /LOG option is the default.
/NOLOG suppresses the various informational messages BUP displays as backup
operations are performed; for example, /NOLOG suppresses the files processed
message (the listing of the files processed).
You might use this option with /NOQUERY, if you are using BUP from a KMON
command and IND control file to write a single disk or magtape output volume.
18 RT–11 Command Descriptions