tape_34xx.3f38f7 <bus ID of the tape device>: A data overrun occurred between the control unit and tape unit
Explanation
A data overrun error has occurred on the connection between the control
unit and the tape unit. If this problem occurred during a write-type
operation, the integrity of the data on the tape might be compromised.
User response
Use a faster connection. If this problem occurred during a write-type
operation, consider repositioning the tape and repeating the operation.