Tradionally, the best method is to buy another SATA drive the same as your boot drive. Get an external enclosure that allows you to run it through a USB or firewire port.
Then use Carbon Copy Cloner to copy your boot disk to that disk every night.
https://www.bombich.com/software/ccc.html
Now, if your computer ever dies, just pop that one out of its enclosure and put it in the computer. Boom. Done.
That method’s still good, but since Leopard came along we also have Time Machine. This one is far easier. You plug a USB or firewire drive in, format it, and tell Time Machine to use it. The big advantage here is that restoring single files is a snap. Need a Photoshop file you erased on purpose last week? Easy. Changed a contact’s cell phone number by mistake? Easy, go get last month’s Address Book.
If your boot drive dies, put another one in and instal OSX on it. When you start it the first time it asks “Do you want to restore from a Time Machine Drive?” Say yes, select it, and it brings everything in.
So the end result from both methods is the same. Here’s the breakdown:
—
Time Machine
PROS:
Can restore entire boot drive
Super easy
Maintains old backups. A new backup doesn’t erase an old one unless it’s out of space, thus you will have not just the last version of a file, but the last several versions.
CONS:
Restoring a boot drive is slow because everything has to copy AND you have to instal OSX again first.
—
—
Carbon Cloner
PROS:
Can restore entire boot drive super-fast. Exchange the drives and you’re done.
CONS:
Focused on recovering the drive, not a single file. If you erase a file, the next backup clone will cement that fact into your backup too. Thus, no ‘multiple-versions’ of past files.
—
So they’re both good, you just have to decide what’s more important to you. I really enjoy the “multiple copies” thing that Time Machine does, so I use that. If getting your computer back less than an hour after a crash is what matters, then Carbon Cloner is a better choice.
I’ve only talked about backing up system drives. Backing up media can work the same way (Time Machine can backup multiple drives, but it can only CONTROL one backup drive. Thus, I have 3 SATA drives being backed up to 1 USB drive. I can’t add more USB drives…I can only replace it with a larger one.) So for Time Machine you’ll want one super-huge external drive that can handle everything, plus extra space for multiple copies.
I haven’t used Cloner, but it’s an application (not a built-in Apple preference) so I imagine you can get a backup drive for each internal drive and just tell it to do one at a time. I’m not positive on that, do some research there if you’re interested.
At any rate, I don’t back up anything that came off of tape since I can re-capture. That makes the whole thing much more manageable since I’m not backing up the video itself. Something to consider.