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More than one backup disk?

1035 Views 6 Replies Latest reply: Mar 18, 2010 11:33 AM by Pondini RSS
William C. Parr Calculating status...
Currently Being Moderated
Mar 17, 2010 11:29 PM
Has anyone tested to see if you can use Time Machine with more than one backup disk? For instance, assume I have a 2TB hard drive at work which I am already using for Time Machine. Can I also set up another 2 TB hard drive at home for Time Machine and use both - - - effectively maintaining an up-to-date backup at home, and one in my work office also?

Bill Parr
MacBook Pro 13", Mac OS X (10.6.2), 750 GB Hard Drive, 8 GB Ram
  • WBW Level 4 Level 4 (1,260 points)
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    Mar 18, 2010 12:14 AM (in response to William C. Parr)
    Do you mean plug in the drive, let TM backup and then take it to work?

    I am not sure if you can, I don't see why you could not. I would remove the other disk first, and plug it back when you're done. If not you can clone the TM drive to that 2nd drive.

    But really if you want off-site backup you should look into Mozy... A good backup solution should be automated. What if you "forget" to bring the drive over for a few weeks or months?
    MacPro 2x2.66 - MBA 1.6 80HD, Mac OS X (10.6.2), AppleTV - iPhone 3GS 32gig
  • WBW Level 4 Level 4 (1,260 points)
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    Mar 18, 2010 12:39 AM (in response to William C. Parr)
    I understand you want to use 2 different drives. Did you read my answer, it mentioned the 2nd drive....

    We still don't know what computer you want to back up on which drive.

    You can only backup one computer on a drive, unless you partition it.
    MacPro 2x2.66 - MBA 1.6 80HD, Mac OS X (10.6.2), AppleTV - iPhone 3GS 32gig
  • WBW Level 4 Level 4 (1,260 points)
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    Mar 18, 2010 10:31 AM (in response to William C. Parr)
    Yes it will work. You may need to select the drive manually each time in the TM preferences, and let it do a long scan but it won't start from scratch.
    MacPro 2x2.66 - MBA 1.6 80HD, Mac OS X (10.6.2), AppleTV - iPhone 3GS 32gig
  • Pondini Level 8 Level 8 (38,710 points)
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    Mar 18, 2010 11:33 AM (in response to WBW)
    WBW wrote:
    Yes it will work. You may need to select the drive manually each time in the TM preferences, and let it do a long scan but it won't start from scratch.


    That wording may be a bit misleading.

    Yes, you can have two separate backups, and you will have to select the drive via TM Preferences each time you swap them.

    The first backup to each drive will be a full one; thereafter each will have it's own, separate, independent set of incremental backups.

    So if you create a file at work and run a backup, then make some changes and run another backup, when you come home and run a backup, the new file will be saved. But the first version won't be on your home backup.
    24" iMac 9,1 2.66 GHz; 4gb; 640 gb, Mac OS X (10.6.2), dual-band AEBS v. 7.4.2

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