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CMS Commands › Utility Statements › BACKUP

BACKUP

FILEDEF commands for the batch command facility (CMS)

FILEDEF userdb DISK userdb dbfile fm

Additional file assignments, as required

FILEDEF SYS001 TAP1 SL VOLID nnnnnn (RECFM VB LRECL llll BLKSIZE bbbb

userdb

DDname of the database file

userdb dbfile fm

File identifier of the database file

nnnnnn

Volume serial number of the tape backup file

llll

Record length of the tape backup file; must be the size of the largest page being backed up.

bbbb

Block size of the tape backup file; must be as large as the smaller of:

  • The size of the largest page being backed up, plus 8 or
  • 32,760