rman crosscheck时RMAN-00571 ORA-19554解决
RMAN> crosscheck backupset;
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=118 devtype=DISK
released channel: ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of crosscheck command at 04/12/2011 13:07:31
ORA-19554: error allocating device, device type: SBT_TAPE, device name: