Re: RMAN error (ORA-19502)

Andrey Goryunov schrieb:
the parameter BACKUP_TAPE_IO_SLAVES was set to TRUE 
(TAPE_ASYNCH_IO set to TRUE as well)
and LARGE_POOL_SIZE was changed to ~170Mb (10 channels operate)
but it did not help. The backup is still failing with the same error. 

Do you have any ideas what else might be tuned?
i had a similar problem. in my case a firewall caused all the trouble. after establishing a direct connection between the database server and the media management server (TSM) the problem has gone. 

regards,
-ap
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