<<Back to Oracle Backup & Recovery Main Page Cause: Previous channel not released Solution: Just restart from rman session and try again RMAN> exit rman target / and try again ................... RMAN> run { allocate channel ch1 device type disk; BACKUP INCREMENTAL FROM SCN 3459834 DATABASE FORMAT '/ora_work/rman/ORCL1P/ForStandby_%U' tag 'FORSTANDBY'; } allocated channel: ch1 channel ch1: SID=50 device type=DISK Starting backup at 04-MAR-21 using channel ORA_SBT_TAPE_1 released channel: ORA_SBT_TAPE_1 released channel: ORA_SBT_TAPE_2 released channel: ch1 RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of backup command at 03/04/2021 09:12:53 ORA-19568: a device is already allocated to this session
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