My company is pretty much going to force me to go away from flat file backups and use a third party solution (similar to CommVault) that uses deduplication for database backups. From what I understand, deduplication only backs up changes since the last backup and in the event that a previous backup gets deleted, it keeps the blocks needed to make the current backup valid...and so on. I see a problem here in the event that disk corruption occurs and you can't get the blocks needed that may have been created long ago. You would also be dependent on the third party software to manage all that properly. I understand deduplication may save time and space but it seems like you are giving up a great deal of reliability to do so. I read Brent Ozar's article from 2009 as well as some other articles about it. I'm wondering if the deduplication process and method has gotten better (more reliable) since then.
Can someone educate me more on the topic? Am I living in the past wanting to do flat file (compressed) backups?