I have been running full multi database backup job to a san for months successfully, now more than half the databases fail (consistently every night), even if I do it manually, including msdb. I can run native sql back to the same san and it works fine. I get the following error SQL Backup job failed with exitcode: 790 SQL error code: 3202 [SQLSTATE 42000] (Error 50000). status = 1117. The step failed.
Can some explain why this has started happening?