

I therefore look at my planned approach and think " I benefit from redundancy, and because I use Time Machine I have multiple versions of each backup, so why can't or shouldn't I use RAID-1 for backup?". I say this because with RAID-1 I get desirable redundancy protection from drive failures (up to a point, naturally), and as I use Time Machine I inherently benefit from the ability to pick and choose from historical backups. In considering the above I've been researching opinions about RAID-1, and in doing this have seen a lot of opinions stating "RAID isn't backup", "never use RAID for backup" and "deleting files from your drive or being infected with a virus will replicate to the RAID with no roll-back", yet when I consider my strategy above - and bearing in mind for a moment that the RAID drive will only be used for Time Machine backup/restore - I feel like these comments don't apply to my planned configuration. I believe this is effectively the 3-2-1 strategy: 1 internal drive, 1 external drive, 1 off-site backup.


