can i backup my mac on 2 different external hard drives

I wouldn't do this if you're using Tiger, as you have to reboot to re-sync the mirror if one drive is a bit slow waking from sleep mode, or if you unmount the mirror and try to remount it. For reference, you can create a mirror'ed set up on 2 external drives, using disk utility. If you only update files on the master, and don't touch the backup drive, then you won't have any sync issues.

This means you use one of the backup drives as the master, and periodically (daily, weekly or whatever) sync the master to the backup using Chronosync or similar. If you want to guard against a drive failure, and have protection against the problems above, then replicating the drive is the way to go. The drawback to this is that it behaves like a single disk, so if you overwrite or delete a file, or have a filesystem problem, then your data is lost on both disks.Ģ. If you just want to guard against a drive failure, then a mirror (RAID1) is an option. You have a couple of options, depending on what your objective is.ġ.

Can i backup my mac on 2 different external hard drives