Before I do a clean install - what are these?

Discussion in 'OS X Yosemite (10.10)' started by Let's Sekuhara!, Nov 15, 2014.

  1. Let's Sekuhara! macrumors 6502

    Let's Sekuhara!

    Joined:
    Jun 30, 2008
    Location:
    日本
    #1
    I had made a Yosemite boot USB drive before installing 10.10 just in case performance issues arose, and I'm glad I did because sure enough - performance became unacceptably slow after "upgrading".
    So I've double backed up all my data and am now about to do a clean install of Yosemite. Not planning to restore configuration-related data such as Applications or Library data.

    What I don't understand is, why are there two additional drives showing up in Disk Utility?

    [​IMG]

    The drive with Macintosh HD is of course my internal drive. And then there's my Yosemite installer. I don't recognize "disk2" or "disk3". Are they partitions? If so, are they partitions of my internal hard drive or the installer drive or what?

    This is not a fusion drive, just a regular HDD.
    Still researching...
    Thanks in advance.
     
  2. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #2
    The two orange volumes are disk images that contain the files that were used to create the USB drive. You can ignore them.
     
  3. gr8tfly macrumors 603

    gr8tfly

    Joined:
    Oct 29, 2006
    Location:
    ~119W 34N
    #3
    Those are used as part of booting to the Recovery HD. They are present no matter what type of device the Recovery HD partition is located on.
     
  4. Let's Sekuhara! thread starter macrumors 6502

    Let's Sekuhara!

    Joined:
    Jun 30, 2008
    Location:
    日本
    #4
    Thank you both for the helpful replies! :)
    Proceeding with clean install...
     

Share This Page