connecting two in series

I want to use two La Cie external hard drives, the first baccking up my mack and the second providing backup to the first. Can this be done by simple connection in series?

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    It is not done by one drive backing up the other but by two drives backing up your Mac, The result is the same. Below are two ways of doing this.

    Do you have Mountain Lion? If so, it allows you to designate two drives to which to backup your Mac. It will alternate its hourly backups between the two LaCie drives and will continue backing up to one if the other is disconnected.

    If you do not have Mountain Lion and do not want to buy it, then you can use Disk Utility to configure two LaCie drives as a RAID 1 volume, then designate that volume as the backup target for Time Machine. TM data will then be written to both disks so if one fails your backup will still be on the other one.

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