折腾很多天的rman备份的磁带库产生的问题。留作纪念，纪念拖延的心理,相互推诿在运维过程中的体现,真诚的希望忽略"备份重于一切"的后果不会发生。。
RMAN-03009: failure of backup command on ch00 channel at 08/30/2011 13:38:03
ORA-19506: failed to create sequential file, name="puml9lk2_1_1", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
VxBSACreateObject: Failed with error:
Server Status: Communication with the server has not been initiated or the server status has not been retrieved from the serve
channel ch00 disabled, job failed on it will be run on another channel
RMAN-03009: failure of backup command on ch01 channel at 08/30/2011 13:38:04
ORA-19506: failed to create sequential file, name="pvml9lkk_1_1", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
VxBSACreateObject: Failed with error:
Server Status: Communication with the server has not been initiated or the server status has not been retrieved from the serve
channel ch01 disabled, job failed on it will be run on another channel
RMAN-03009: failure of backup command on ch02 channel at 08/30/2011 13:38:04
ORA-19506: failed to create sequential file, name="q0ml9lkk_1_1", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
VxBSACreateObject: Failed with error:
Server Status: Communication with the server has not been initiated or the server status has not been retrieved from the serve
channel ch02 disabled, job failed on it will be run on another channel
released channel: ch00
released channel: ch01
released channel: ch02
released channel: ch03
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ch03 channel at 08/30/2011 13:38:04
ORA-19506: failed to create sequential file, name="q1ml9lkl_1_1", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
VxBSACreateObject: Failed with error:
Server Status: Communication with the server has not been initiated or the server status has not been retrieved from the serve
