OS Tape Labels Release 21

This publication describes how the IBM Systcm/360 Operating System processes magnetic tape volumes with IBM standard labels, American National Standard labels, nonstandard labels, or no labels. Included for the guidance of programmers and operations analysts are discussions of:

• Label formats and contents
• Tape volume layouts
• Label processing for input, output, multiple data set. and multiple volume conditions
• T ape characteristics
• Nonstandard label processing routines and volume label editor routines
• Component considerations
• Using tape volumes created by other systems External labels