生产环境：带库TS3200(单驱动器)+TSM5.4.1+oracle11gR2 RAC
物理备份时报错，报错信息如下：
channel t1: starting piece 1 at 06-JUL-14
released channel: t1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on t1 channel at 07/06/2014 22:00:24
ORA-19502: write error on file "backdb<nxjcydb_211:852242409:1>.dbf", block number 577 (block size=8192)
ORA-27030: skgfwrt: sbtwrite2 returned error
ORA-19511: Error received from media manager layer, error text:
ANS0326E (RC41) This node has exceeded its maximum number of mount points.
Recovery Manager complete.
求教，这是什么错误引起的。
------解决方案--------------------
检查下tsm的配置，修正过来
和Oracle应该没有关系