321 backup – Storage Types
If your backup is on same drive as the primary / production copy if the complete drive fails both copies are lost.
- This configuration would work where a file is deleted from primary and just needs recovering from local backup albeit on the same physical media.
Disks bought at the same time with the same average MTBF like to fail at similar times.
Two say internal hard disk drives but in different storage locations is acceptable
Different storage types include internal disk drives, magnetic tape:LTO,DLT,DAT, external hard drives, SSD, USB drives, SD-cards, CDs, DVD, Blu-ray.