ORA-19511: Error received from media manager layer

 

RMAN Backup Failed with

Error Message:
ORA-19506: failed to create sequential file, name="<SYS00S_1846:751266012:1:33>.df", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
   Vendor specific error: OB2_StartObjectBackup() failed ERR(-17)

Cause:
The root cause of the backup failures was that the VLS ran out of tapes. 

Resolution:
Free up tapes from expired backups or add new tapes. 
Reboot the VLS to get the backups working again.