05-06-2009, 01:56 PM

Hi! I was wondering how to make the contents of two external drives identical, I want to make an exact copy of my 1 terabyte external drive (A) on another 1 terabyte drive (B) because it would be a disaster if I lost the data in case one of the drives breaks down.

It would be great that when I put new files on drive A they also went to the drive B automatically. Same if I erase a file from drive A. This is called syncing isn't it?

I hope you'll be able to help me, this forum has always been so great!! It would also be great if the solution you find was free.

05-06-2009, 02:39 PM

Good question. I'm looking to do the same thing (software RAID) with my .mp4 videos, iTunes, etc...

05-06-2009, 03:08 PM

Its simple, its called RAID, more specifically RAID 1 (mirrored)

RAID - Wikipedia, the free encyclopedia

A Raid set of disks can be set up with disk utility, but you will probably need to beg or borrow a third disk to back-up your data before you create the 1 terabyte (2 x 1 TB drives) raid set

05-11-2009, 02:23 PM

isn't there a way using Automator instead? There is an action called Sync Folders, (how) can I use it?

05-11-2009, 02:59 PM

You could use chronosync or RsyncX do do the job, but it will not be nearly as automatic as a Raid set-up. You just dont want to sync the drives, you seem to want to mirror them.

If you want a GUI for the Unix syncing services then RsyncX maybe what you are after