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Thinking of moving to iMac from PC, got a few questions

1680 Views 34 Replies Latest reply: Jan 12, 2013 5:36 AM by dwb RSS
  • Shootist007 Level 6 Level 6 (16,640 points)
    Currently Being Moderated
    Jan 12, 2013 2:26 AM (in response to dwb)

    dwb wrote:

     

    By default TimeMachine does not back up your Parallels virtual machine and if you think about it that's a good thing. Since the Virtual Machine is in effect a hard drive, just booting up Windows or launching a program changes the VM file as temporary files are created. My VM is 25GB so not only would TimeMachine be making a copy of the VM every hour that Parallels is running, it would be copying 25GB! Not good.

     

     

    That is Completely false. Time Machine DOES backup every file on the hard drive. As a Virtual Machine is just a bunch of Files Emulating a hard drive only to the operating system installed through the virtual machine software program. OS X and TM sees those files for what they really are, FILES. It has no knowledge they are being used as a Emulated Hard Drive for some program and or opperating system.

     

    I don't use Parallels but I do use VMware Fusion and when I use TM to backup and then restore my Mac my VMs of both Windows and Linux are Backed Up and Restored.

  • dwb Level 6 Level 6 (19,695 points)

    You are right today. I was right until late 2010 and I'd forgotten version 5 of Parallels made a big change to the virtual machine's construction. Up until version 5 of Parallels a virtual machine was more like a monolithic file than a folder so all you had to do was change a single file inside the machine (booting up was enough) and TimeMachine backed up the entire machine. The first update to Parallels included code that automatically excluded it from TM backups. I don't remember when VMWare started doing it.

     

    This is how the situation remainded with TM and Parallels until version 5 - again I don't know when VMWare made the switch. Today a TM sees a virtual machine as a folder so only the changed files are updated.

     

    After using PD from v1 to v4 I forgot that v5 made that change. I'm human...what are you?

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