No, it does not matter, the format stays the same. The difference is that there is some extra logic behind Bakup To Tape allowing to manage backup chains more effectively.does it write to the tape differently depending on if it is a file backup job of a .vbk vs a backup copy job of a backup
I'd assume for deduplication purposes the data blocks would be nearly identical either way.
Tape filesystem stays the same, no changes. Veeam writes files in the same manner in all cases, using the MTF (Microsoft Tape Format) industry format. However there is no guarantee that tapes written by Veeam will be read with no difficulties on a non-Veeam machine. On the other hand, you can use FREE version of VBR in order to extract files/backups from tape.what does the file system of the tape look like depending on the backup to tape job type?
Yes, the data is the same in both cases, whether it's a File To Tape job or Backup To Tape. The only difference is that when you use the latter it also copies .vbm metadata file to tape as well. Compression level in job advanced settings is what defines the compression ratio thus influencing the effectivity of a dedup-appliance.By deduplication, I'm referring to Veeam's dedupe friendly compression level in concert with a separate, proprietary, deduplication appliance; not Veeam's own deduplication features. From your answer's, it sounds like the data is the same.
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