Before upgrading a system or applying a patch, which type of backup will not interfere with backup cycle and allows us to do a full restore with a single tape.
A: Full backup.
B: Incremental backup.
C: Differential backup.
D: Copy backup.
CBK 7: Security Operations
Source: ThorTeaches.com practice tests
D: Copy backup: This is a full backup with one important difference, it does not clear the archive bit. Often used before we do system updates, patches and similar upgrades. We do not want to mess up the backup cycle, but we want to be able to revert to a previous good copy if something goes wrong.