Booting off USB optical drive

Discussion in 'MacBook Pro' started by jnev, Feb 17, 2010.

  1. jnev macrumors newbie

    Joined:
    Sep 6, 2007
    #1
    So I have a 2.2GHz SR MBP, and the superdrive just went out on me. It will read and write to CDs, but won't recognize any DVDs that I insert into it. I bought a USB enclosure and DVD drive, and it works fine to read and write to DVDs when in Snow Leopard, but I am unable to boot from it (specifically so I can install Windows 7, but I can't boot SL either). I reboot and and hold down option, and only see Macintosh HD, not the disk I'm trying to boot off. I've cloned SL to my flash drive and I can boot off that fine, but unfortunately I'm unable to do that with Windows...

    Any ideas? I've googled it and it seems like booting off a USB optical drive is supported, so I'm unsure why it's not working for me...
     
  2. Alvi macrumors 65816

    Alvi

    Joined:
    Oct 31, 2008
    Location:
    Mars
    #2
    Interesting issue, if i was you i'd rather buy the MacBook Air superdrive, since it's apple and it should work better? Try to call apple or ask in the MacBook Air forum community because they proly face that kind of issues more often than MacBook Pro owners
     
  3. jnev thread starter macrumors newbie

    Joined:
    Sep 6, 2007
    #3
    Well this is what I have, and I'm wondering how to make it work, not what to replace it with. Besides, an optical drive is an optical drive. They're all USB and all work the same.
     
  4. pacmania1982 macrumors 6502a

    pacmania1982

    Joined:
    Nov 19, 2006
    Location:
    Birmingham, UK
    #4
    Unfortunately Apple have crippled these drives so they only work with the MacBook Air and the new Server Mac mini

    pac
     
  5. m85476585 macrumors 65816

    Joined:
    Feb 26, 2008
    #5
    I am able to boot off my old external DVD burner connected by USB but not by Firewire. It is a monstrous 5.25"" Plextor drive that has its own power supply.
     
  6. psxtreme macrumors member

    Joined:
    Jun 27, 2009
    #6
    Not sure if it will do anything but you can try installing rEFIt
     
  7. jnev thread starter macrumors newbie

    Joined:
    Sep 6, 2007
    #7
    Do you do anything specific to boot off it? What keys do you hold at boot?
     
  8. rgarjr macrumors 603

    rgarjr

    Joined:
    Apr 2, 2009
    Location:
    Southern Cal
    #8
    Now why would they go do something dumb like that..


    I also need to boot of a USB DVD drive since I need to re-install W7 soon on my Macbook and it has no superdrive in it (optibay caddy in it). Haven't tried it yet though.
     
  9. m85476585 macrumors 65816

    Joined:
    Feb 26, 2008
    #9
    I can't remember. I think it was either Option or C for CD.
     
  10. jnev thread starter macrumors newbie

    Joined:
    Sep 6, 2007
    #10
    Well I tried using refit, and even that was unable to recognize the DVD. It's wierd, as soon as I boot up onto OS X the DVD is mounted on the desktop, so I know the DVD drive is working and is able to read DVDs. Any other ideas on what could be causing this, or how I can get around it and finally get Windows installed on my laptop?
     
  11. jnev thread starter macrumors newbie

    Joined:
    Sep 6, 2007
  12. rgarjr macrumors 603

    rgarjr

    Joined:
    Apr 2, 2009
    Location:
    Southern Cal
    #12
    I just re-installed Windows 7 on my MacBook using a regular Samsung DVD USB drive.

    I just held down the Options key and the disc icon appeared on my Boot choices.
     
  13. jnev thread starter macrumors newbie

    Joined:
    Sep 6, 2007
    #13
    well that's awesome. mine doesn't show the disc at all when booting. either I have a bad optical drive or... I have no idea...
     
  14. m85476585 macrumors 65816

    Joined:
    Feb 26, 2008
    #14
    Can you install Windows 7 from a USB flash drive?
     
  15. jnev thread starter macrumors newbie

    Joined:
    Sep 6, 2007
    #15
    I've tried that actually, and for some reason when I use disk utility to restore the ISO file to my flash drive, it gives me the error "Could not validate source - error 254". It's weird because I can put SL on the flash drive without any problems, and have done so multiple times. Are there any other programs I can use to clone the windows ISO file to my flash drive?
     

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