HP BACKCOPY Reference Manual page 292

Table 20 TAPE DEFINE Consistency Rules (continued)
Check Number
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292 CLASS TAPE DEFINEs
Description
If you specify LABELS BYPASS or LABELS OMITTED, then DEVICE is required, and these attributes
might not be specified: BLOCKLEN, EBCDIC, EXPIRATION, FILEID, FILESECT, FILESEQ, GEN,
OWNER, RECFORM, RECLEN, REELS, RETENTION, SYSTEM, USE, VERSION, and VOLUME.
If you specify VOLUME SCRATCH, then USE IN or USE EXTEND is not allowed.
If you specify LABELS IBM or LABELS IBM BACKUP, you must also specify FILEID and RECFORM.
If you specify RECLEN but not BLOCKLEN, you must specify a RECLEN value greater than zero.
If you specify LABELS IBMBACKUP, the DEVICE or SYSTEM attribute must specify a system running
version C20 or later of the NonStop operating system.