Frequently iam facing the problem with drive offline error. So please let me know how to prevent this issue.
Hello, Check your windows events for system errors that occur during the time the Autoloader goes offlne.
also please take a look at this link for potential solutions. http://www.symantec.com/business/support/index?page=content&id=TECH24414
Your drive manufacturer would have a diagnostic utility that you can download and run against the autoloader. Stop the BE services first, and run a health check. This will tell you if you have hardware issues or not.
If you find this is a solution, please mark it as such.
Tahk you for your suggestion. Your comment had resolve my issue.