Backing up single external HD using 2 Macs

I keep all my stuff on an external HD. I usually backup the external HD using time machine on my Mac_1 to my time capsule.
I recently bought another Mac_2. If I use time machine on Mac_2 to backup the external HD, will it create a separate backup on the time capsule.
If so, is there a way I can use the same external HD backup on the time capsule and use either of the Macs to backup the HD.

Hi,
The question is not backing up 2 Macs to the same external HD.
My question is the opposite... how to back up an external HD to time capsule when I connect it to different Macs ( I have two Macs tied via wifi to a time capsule).

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AirPort Time Capsule back up of external drive using Time Machine

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Connect the drive to the Mac mini, open the Time Machine pane of System Preferences, and remove it from the list of drives set to be excluded. It needs to be formatted as Mac OS Extended (Journaled).
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Backing up an external drive using Time Machine

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Backup Software Recommendations
Carbon Copy Cloner
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Hi folks,
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Hi kehander,
Thanks for the reply. I tried filling a constant path with the Mac-defined path to a data file on the USB disk (ie "DATA2:file1.dat"). This resulted in the same error message.
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Jimmy
www.blue-print.me.uk
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I would like to know if you have to back up a macbook hard drive, can I use a external hard drive that has been previously used to back up several pc 's, or is it best to have a separate external drive for the Mac?

In the Mac side of things, backups usually come in two flavors: clones or incrementals.
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I recently purchased 13" Macbook Air with OS 10.10.2. I want to use my 1TB Seagate backup plus external hard drive as time machine and my windows 7 pc. Please suggest a method. Thanks in advance for your reply.

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Encrypting an external hard drive and specific folders within. Permission denied using disk image.

VKP90 wrote:
When I tried to encrypt a single file within the hard drive itself, I got the following: Disk Utility Progress: Unable to create "Name of my file" (Permission Denied).
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Single best external storage solution for Mac Pro & MacBook Pro ...?

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I'm still waiting for the Mac Pro delivery I have around me something like four external hard drives from different vendors and different sizes and all containing important data ... it is really a mess, cables, lack of redundancy, etc.
I wanted to replace all these once and for all by a single elegant long-lasting and reliable solution to combine with my new Mac Pro and MacBook Pro. The best I could find was OWC Mercury Elite-AL Pro Qx2 8.0TB containing four internal HDD in double RAID with multiple possible setups: RAID 0 and RAID 1, RAID 10 configurations:
http://eshop.macsales.com/item/Other%20World%20Computing/MEQX2T8.0S/
Looks like an excellent choice for the only one external storage solution! does anyone has experience with this model? are there better contenders?
Many thanks in advance,
Best regards,
Giovanni

Giovanni,
I have the OWC Mercury Elite-AL Pro Qx2 (6 TB) external HD array in a Raid 5 configuration (as received from OWC). I have found it to be excellent when connected to my Mac Pro using a PCI SATA card and the SATA output on the Elite-AL Pro Qx2. The speed of the system under Raid 5 easily supports all but uncompressed high definition video, and the system came with Prosoft's Data Backup software which does an excellent job of backing up other external drives installed on my Mac Pro.
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Backing up photos on iMac using external hard drive and time machine

How do i back up photos from my imac using an external hard drive and time machine
Thanks in advance

Apple explains how to use Time Machine in http://support.apple.com/kb/ht1427.
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How to back up an external hard drive using Time Machine

I have a Macbook. I have iTunes. I have my iTunes folder and contents stored on an external (Lacie) hard drive. I want to be able to back up that external (Lacie) hard drive and my mac using Time Machine to a separate external hard drive. At the moment it is only my mac that is backed up, and not the Lacie. How can I also back up the Lacie so that only the recently added iTunes content is added? Cheers.

You may consider reading the detail in what third-party clone utilities could
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Once the copy/clone is made (a bootable backup, btw) the same utility can
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Backing up single external HD using 2 Macs

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