OPERATIONAL DEFECT DATABASE
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All tape write operations fail for MHVTL drives if the data block size is not set to 65,536 bytes.
Starting in Veeam Backup & Replication v9, a new algorithm for automatically selecting the data block size was implemented. The software will automatically detect the highest available block size the tape drive reports being able to use and run jobs according to this value. However, this does not operate correctly with the MHVTL emulated tape drives.
To resolve this issue, manually set the tape drive block size to 65536.
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