Re: Best way to mirror two drives

["Mark Lanett" <mlanett@parrotchat.net>]

RAID is not a backup solution, it is a hardware failure solution. You will
not be protected against user error. Running a mirror with a delay gives you
a chance to recover accidentally deleted files.

For backups:
dd: Perfect copy. Only works with identical partitions. Slow (copies empty
space). No incremental backup.
cp: Can't delete files.Doesn't handle hard links.
rsync: Keeps all attributes. Handles hard links. Allows incremental backup.
Can delete files.

BTW there are lots of hard links on a Linux box, run
    find / -type f \! -links 1

My choice:
rsync --archive --hard-links [ --delete | --backup ] SRC DST

~mark