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How a 60GB Database Backup Became 1TB

Garry Bargsley points out the importance of a tiny flag:

I put on my investigator hat and begin looking around. I started with the Windows File Server to see what was actually on the drive in question. Just as I thought, three SQL backup files were in there proper folder. Although there were only three files, something else caught my attention. One backup file was 800GB and another 1TB. That was strange as I don’t think the source databases are that big. Sure enough, I look and one database is 60GB and the other is 45GB.

Something is not right here!! So, next, I run a RESTORE HEADERONLY against one of the backup files. What did I see?

Read on to learn what Garry saw, and then what Garry didn’t see.