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Haalcyon

 
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Member Since: May 03, 2011
Posts: 24
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Mac Specs: 2010 Mac Pro | 2011 15" MacBook Pro | 2009 13" MacBook Pro

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I would go ahead and get the WD MyBook 2TB and something like Lacie's SilverKeeper (free, simple...no need for complexity here) to backup your 1TB and 500GB drives. You could do this on a weekly or daily basis. Not only will you have a backup but you'll have some level of versioning as well. If, say, you delete or lose a file on the 1TB drive you could go back to last week's backup and retrieve it.

I'm not sure you set up a multiple RAID1 arrays against the same drives like it sounds like you've suggested (the 1TB mirror and then the 500GB mirror) with OS Xs software RAID (...but TBH, I've not tried it).

Macs? Oh yes, several.
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