Dell Powervault TL4000 Tape Library Service & Repair. Our expert trained technicians can handle any issue with your PowerVault TL4000 library. From the picker assembly to the power supply, we have you covered. Tapes can be imported and exported individually using the mail slot or twelve at a time using one of four magazines. Over 2,000 Compatible Storage Devices. Mac Windows; Status: Qualified: Qualified: Minimum Product Required: Workgroup: Single Server.
Not quite sure if I have the exact solution for you but I had a very similar problem with BackupExec 12.5 & a Dell TL4000 tape library (2x LTO3 drives/48 slots) which only started after I upgraded BE to 12.5.
Called both Symantec & Dell. Symantec basically went through diagnosis to determine that the issue wasn't theirs !!
Did diags with Dell and they reckoned that both drives in the library had been trashed by the drives having been cleaned too often. Dell said that they wouldn't normally replace the drives but then proceeded to anyway. They recommended either that either:
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Personally I reckoned that it was BE 12.5 that was causing the problem as I hadn't had this issue with 11.5. I think BE 12.5 was somehow mounting the cleaning tape in some hidden inventory operation.
I have subsequently upgraded to BE 2010 and hoping I'm not going to see a reoccurence of this issue.
Hope something in here may help you.