oracle rac使用TSM备份报错
oracle 版本11.2.0.4.0
tsm client版本7.1.1
tsm server版本7.1.7
操作系统版本 Redhat7（AIX也遇到过），报错大致相同，查看虚拟带库容量充足，为什么会报空间不足呢？而且没有达到迁移的量。
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ch01 channel at 02/09/2019 09:04:32
ORA-19513: failed to identify sequential file
ORA-27206: requested file not found in media management catalog
ORA-19502: write error on file "4btpefr0_1_1", block number 53248 (block size=8192)
ORA-19511:Error received from media manager layer, error text:
ANS1329S (RC29) Server out of data storage space
channel c1 disabled, job failed on it will be run on another channel
released channel: c1
released channel: c2
今天巡检又遇到了这类问题，已记录下来，具体日志看下面回复
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