same here (veeam case # 00933074 ) ... it began by the end of april 2015, no problems before. (without changing anything in the configuration or infrastructure) there a 3 tape jobs, writing to an IBM autoloader with 2 drives. sometimes all 3 jobs do well, but it gets worse. VEEAM recommended updating to the latest version (8.2b) - without success. usually 2 out of 3 won't work. sometimes tape 0 is affected, sometimes tape 1, sometimes both. this is really annoying. veeam has all job-logs, logs of the ibm-tape tool. the case is open for 3 weeks now. I really do hope to get this fixed soon because I have 30 days backup to disk available, the older backups will be discarded from disk, therefore I need the tapes.