I need a solution
RMAN> allocate channel for maintenance device type sbt parms 'SBT_LIBRARY=oracle
.disksbt, ENV=(BACKUP_DIR=/tmp)' debug 1;
allocated channel: ORA_MAINT_SBT_TAPE_1
channel ORA_MAINT_SBT_TAPE_1: SID=20 device type=SBT_TAPE
channel ORA_MAINT_SBT_TAPE_1: WARNING: Oracle Test Disk API
RMAN> crosscheck backup;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of crosscheck command on ORA_MAINT_SBT_TAPE_1 channel at 07/
19/2017 11:19:10
ORA-27191: sbtinfo2 returned error
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