You can control tape selection by specifying a serial number or list of serial numbers in the file attribute list associated with the output file. If the required tape is not available when the output file is opened, DUMPALL is suspended with the following message:
<mix number> <file name> REQUIRES MT [<serial number>] #1
If a serial number is not specified and tapes are required to run the DUMPALL utility, the operating system performs one of the following operations:
-
If the system option SERIALNUMBER is not set, the operating system selects any available scratch tape. If a scratch tape is not available, the operating system suspends DUMPALL with the following message:
<mix number> <file name> REQUIRES MT #n
When a scratch tape becomes available, the operating system assigns the tape to DUMPALL.
-
If the system option SERIALNUMBER is set, the operating system suspends DUMPALL with the following message:
<mix number> <file name> REQUIRES MT #n
When a scratch tape becomes available, the operator responds with the following system command. The variable nn is the unit number of the tape drive.
<mix number> OU MT nn
If DUMPALL fills up the entire tape volume and still has more data to copy, it requests another tape volume from the operator by the same process it used for the first volume. When that tape is assigned, DUMPALL continues the copy process on the new volume.
