We came across an issue where large tape backup jobs that spanned multiple tapes would fail a full tape wasn’t swapped out within 1 hour in our standalone tape library.
The timeout for the “Job waiting for tape” alert can be increased by changing the “PromptingTimeOut” registry entry found under “HKLMSoftwareMicrosoftMicrosoft Data Protection Manager1.0Prompting”
The value for this registry entry is to be increased in milliseconds, below are some you made find useful:
2 hours = 7200000
12 hours = 43200000
24 hours = 86400000
48 hours = 172800000