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OS X - Operating System General OS operation information and support

Backing uop with Time Machine


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Alwyn

 
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Hey ho we're now a 2 iMac couple, both Senior Citizens! I have 2 1TB external drives and use them alternately to back up. Is there a way to back up both Macs to one drive? If not can I alternate the external drives between the 2 iMacs or are they dedicated?
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cwa107

 
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Generally it's a good idea to dedicate one drive to Time Machine. However, if you have enough space on the single drive, you could partition it and dedicate one partition to each iMac.

So, since your iMacs have a 500GB drive each and you have 2 1TB externals, theoretically you could use the Partition tab in Disk Utility to split one of the drives into 2 500GB partitions. That should be enough to give you a decent backup and allow you to share it between the two machines.

Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!
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Alwyn

 
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Quote:
Originally Posted by cwa107 View Post
Generally it's a good idea to dedicate one drive to Time Machine. However, if you have enough space on the single drive, you could partition it and dedicate one partition to each iMac.

So, since your iMacs have a 500GB drive each and you have 2 1TB externals, theoretically you could use the Partition tab in Disk Utility to split one of the drives into 2 500GB partitions. That should be enough to give you a decent backup and allow you to share it between the two machines.
Thanks; I've done one and will try it out before doing the other one.
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Alwyn

 
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Quote:
Originally Posted by cwa107 View Post
Generally it's a good idea to dedicate one drive to Time Machine. However, if you have enough space on the single drive, you could partition it and dedicate one partition to each iMac.

So, since your iMacs have a 500GB drive each and you have 2 1TB externals, theoretically you could use the Partition tab in Disk Utility to split one of the drives into 2 500GB partitions. That should be enough to give you a decent backup and allow you to share it between the two machines.
I did as you said but have since been told by Applecare that you can back up 2 Macs to the same Time Machine. This seems to me a more satisfactory solution as one Mac may use up more capacity than another.

For anybody else thinking of doing this you do of course have to eject from one Mac and connect to the next. If you have 2 external hard drives (I label them 1 & 2) you also have to go to System Preferences on the dock and click on Time Machine to get the option to choose the disk to use; otherwise it doesn't know that it's the current Time Machine. Don't try going staright to Time Machine on the dock as that takes you into the Time Machine 'universe'.
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cwa107

 
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Quote:
Originally Posted by Alwyn View Post
I did as you said but have since been told by Applecare that you can back up 2 Macs to the same Time Machine. This seems to me a more satisfactory solution as one Mac may use up more capacity than another.

For anybody else thinking of doing this you do of course have to eject from one Mac and connect to the next. If you have 2 external hard drives (I label them 1 & 2) you also have to go to System Preferences on the dock and click on Time Machine to get the option to choose the disk to use; otherwise it doesn't know that it's the current Time Machine. Don't try going staright to Time Machine on the dock as that takes you into the Time Machine 'universe'.
That's interesting. Are you sure they said 'Time Machine' and not 'Time Capsule'?

Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!
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Alwyn

 
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Originally Posted by cwa107 View Post
That's interesting. Are you sure they said 'Time Machine' and not 'Time Capsule'?
Yes and I've de-partitioned both drives and test-driven one of them. From Finder/Time Machine/Backups/ it shows the 2 iMacs by name. Clicking on Time Machine in Applications will only show the iMac to which Time Machine is connected.
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SweetPea

 
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I have several questions:
I have a 500 GB can I use a 500 gb external drive w/time machine - is that "big" enough?
If the worst happened and I lost everything, how do I get everything back from the external drive if my computer has crashed?

Thanks for all the info.

SweetPea
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