Netbackup之前備份RAC數據一直都非常正常，突然這幾天出現異常：
channel ch00: starting piece 1 at 2013-11-24:18:02:32
released channel: ch00
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ch00 channel at 11/24/2013 18:03:17
ORA-19506: failed to create sequential file, name="bk_20131124_u0boppfpn_s2059_p1_t832356151", 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
RMAN>
Recovery Manager complete.
檢查磁帶空間， 可以正常MOVE，而且另外機器負責文件型的備份一直沒有問題，排除磁帶機問題；
磁帶還有剩余空間，且Oracle池中還有另外一個磁帶，不存在空間不足問題。
再檢查備份任務：
2013/11/26 12:35:01 - Info bpbrm(pid=3812) dbrac01 is the host to backup data from
2013/11/26 12:35:01 - Info bpbrm(pid=3812) reading file list from client
2013/11/26 12:35:02 - Info bpbrm(pid=3812) listening for client connection
2013/11/26 12:38:29 - Info nbjm(pid=4392) starting backup job (jobid=4706) for client dbrac01, policy otest, schedule Default-Application-Backup
2013/11/26 12:38:29 - Info nbjm(pid=4392) requesting STANDARD_RESOURCE resources from RB for backup job (jobid=4706, request id:{0BC443C1-FEAE-4467-9D11-4779578CFFFA})
2013/11/26 12:38:29 - requesting resource dbrac01-hcart2-robot-tld-0
2013/11/26 12:38:29 - requesting resource win2008nbu.NBU_CLIENT.MAXJOBS.dbrac01
2013/11/26 12:38:29 - requesting resource win2008nbu.NBU_POLICY.MAXJOBS.otest
2013/11/26 12:38:31 - granted resource win2008nbu.NBU_CLIENT.MAXJOBS.dbrac01
2013/11/26 12:38:31 - granted resource win2008nbu.NBU_POLICY.MAXJOBS.otest
2013/11/26 12:38:31 - granted resource T722L5
2013/11/26 12:38:31 - granted resource IBM.ULT3580-TD5.000
2013/11/26 12:38:31 - granted resource dbrac01-hcart2-robot-tld-0
2013/11/26 12:38:31 - estimated 0 Kbytes needed
2013/11/26 12:38:31 - Info nbjm(pid=4392) started backup (backupid=dbrac01_1385440711) job for client dbrac01, policy otest, schedule Default-Application-Backup on storage unit dbrac01-hcart2-robot-tld-0
2013/11/26 12:38:33 - started process bpbrm (3812)
2013/11/26 12:38:33 - connecting
2013/11/26 12:38:34 - end writing
cannot connect on socket(25)
並未mount磁帶就結束了，是OS問題？
檢查操作系統，結果發現C盤的可用空間為0： C盤分配80GB，為系統盤，只安裝OS，發現頁面文件占了近70GB，C盤空間完全用完，問題應該在此了。
調整頁面文件分配，再次啟動機器這台機器，手動備份Oracle庫正常。