TSM备份服务器异常

aix端的备份日志:

channel t2: starting piece 1 at 13-AUG-2016    08:00:09

RMAN-03009: failure of backup command on t2 channel at 08/13/2016 08:02:44

ORA-19502: write error on file "dbfull_919756808_107927_1", block number 129 (block size=8192)

ORA-27030: skgfwrt: sbtwrite2 returned error

ORA-19511: Error received from media manager layer, error text:

   ANS1312E (RC12)   Server media mount not possible

channel t2 disabled, job failed on it will be run on another channel

released channel: t1

released channel: t2

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03009: failure of backup command on t1 channel at 08/13/2016 08:04:59

ORA-19502: write error on file "dbfull_919756808_107926_1", block number 97 (block size=8192)

ORA-27030: skgfwrt: sbtwrite2 returned error

ORA-19511: Error received from media manager layer, error text:

   ANS1312E (RC12)   Server media mount not possible

Recovery Manager complete.

在tsm备份服务器上，查看tsm进程都正常运行。但是在cmd命令行下，执行dsmadmc，提示‘dsmadmc不是内部命令’。

在web管理页面中，查看“运行状况监视器”，出现错误：

本人对tsm不了解，需要各位大神能给他建议，判断是哪部分的问题。