You can control the tape input to DUMPALL by specifying the correct file title of the tape file that you want DUMPALL to print or copy. DUMPALL automatically picks up the record size and block size information for the file from the tape labels.

If you do not specify the correct file title, if the file is not the first file on the tape and the tape does not have a standard tape file name in the form volumeid/fileid, or if the tape is not online when you run DUMPALL, the operating system suspends DUMPALL with the following message:

<mix number> NO FILE <file name> (MT) #n

The operator can mount the appropriate tape or use the IL (Ignore Label) or FA (File Attribute) system command to force the operating system to select a tape.