After Upgrading MP Hard Drive...?

Discussion in 'Mac Pro' started by Mac In School, May 27, 2008.

  1. Mac In School macrumors 65816

    Jun 21, 2007
    Okay, It's stupid question day...

    I'm going to upgrade my primary hard drive, then erase the old one and use it for data. I figure I'll give Carbon Copy Cloner a try.

    After I copy stuff over, how do I specify that I want to boot from the new one? How will I even know which one it is? Won't they both have the same "Macintosh HD" name?

    Any tips for making the old one "unbootable"?

    I'm a little nervous about this. Thanks.
  2. zmttoxics macrumors 65816


    May 20, 2008
    The quickest way to see which disk is the one you booted off of is to get info for the drive on the desktop and check the size to see if it matches your new drive.

    A better way is to open the terminal and type: df -h :to see which disk is mounted for root ( / ).
    sh-3.2# df -h
    Filesystem      Size   Used  Avail Capacity  Mounted on
    /dev/disk0s2   233Gi  123Gi  109Gi    53%    /
    As for picking which one to boot off, I believe you hold down the Alt (option) key during boot to pick a bootable disk to load.
  3. smirk macrumors 6502a


    Jul 18, 2002
    Orange County, CA
    To designate a startup disk, open System Preferences and click on the Startup Disk icon to bring up the Startup Disk control panel. Then just click on the hard drive you want to boot from and either click "Reboot" or simply quit the control panel.

    Is that what you were asking for?

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