CommVault Oracle backup fails with error code 62:342

Out-of-the-blue we encountered that two of our Oracle databases started failing with the error code “62:342″ and description “Encountered an I/O error while performing the operation”. The odd thing is that we have more than 15 databases on the server and only two of them were having the issue.

Important to note is the fact that the server itself is a MediaAgent, which means the server has access to a shared tape device (in our case a VTL). The VTL itself is shared with approximately 90 MediaAgents and the storage policy used for database backup is associated with more than 250 databases. And… only 2 were failing…

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