給一個客戶的數據庫做健康檢查，發現rman的備份日誌中存在如下錯誤：
Starting backup at 08-MAR-13
current log archived
channel n1: starting archive log backupset
channel n1: specifying archive log(s) in backup set
input archive log thread=2 sequence=968 recid=1561 stamp=809397109
input archive log thread=2 sequence=969 recid=1563 stamp=809483508
channel n1: starting piece 1 at 08-MAR-13
RMAN-03009: failure of backup command on n1 channel at 03/08/2013 00:30:23
ORA-19506: failed to create sequential file, name="orcl-eio3vf4t_1_1.arc", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
ANS1017E (RC-50) Session rejected: TCP/IP connection failure
channel n1 disabled, job failed on it will be run on another channel
channel n2: starting archive log backupset
channel n2: specifying archive log(s) in backup set
input archive log thread=2 sequence=968 recid=1561 stamp=809397109
input archive log thread=2 sequence=969 recid=1563 stamp=809483508
channel n2: starting piece 1 at 08-MAR-13
released channel: n1
released channel: n2
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup plus archivelog command at 03/08/2013 00:30:25
ORA-19506: failed to create sequential file, name="orcl-ejo3vf7n_1_1.arc", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
ANS1017E (RC-50) Session rejected: TCP/IP connection failure看信息是TCP/IP 連接失敗，會話被拒絕。於是我嘗試登陸TSM看下：
[infodb1:root:/usr]# dsmadmc
IBM Tivoli Storage Manager
命令行管理界面 — 版本 5，發行版 5，級別 0.0
(c) Copyright by IBM Corporation and other(s) 1990, 2007. All Rights Reserved.
輸入用戶標識：admin
ANS1017E 拒絕會話：TCP/IP 連接故障
ANS8023E 不能與服務器建立會話。
ANS8002I 最大返回碼爲 -50。還沒有輸入口令，就報錯了，於是跟TSM工程師打電話，其告知目前TSM Server正在重裝，現在還用不了。
對TSM不是特別熟悉，也不知道有什麼問題竟然需要對TSM進行重裝？
先記下來，備查！