Currently Being ModeratedApr 8, 2012 5:09 AM (in response to Philip Keller)
Yes you need to partition that drive. then do the install again of Lion.
Currently Being ModeratedApr 11, 2012 12:07 AM (in response to Shootist007)
The answer is: yes and no. Yes, the partitioning is necessary, but no, it's not sufficient.
When you install Lion, it explicitly prohibits installing to Time Machine volumes.
=> Does anyone know why?
So indeed, you need a separate partition to install the OS.
So I did that, but I still can't boot from the USB drive. After checking with LaCie that I'm not experiencing a problem similar to https://discussions.apple.com/message/10356368#10356368, I found that it does boot on my desktop machine.
=> Does anyone have any ideas how the two machines might differ?
They are both Intel machines (apparently you can't boot PowerPC machines from USB). The one that works is an iMac 27" mid-2010 ("iMac11,3"), and the one that doesn't is a MacBook Pro 17" mid-2007 ("MacBookPro3,1").
Incidentally, to solve my immediate problem, I bought a 32GB USB Flash drive and installed Lion on that. Works like a charm... which begs the question, what's different with the hard drive??
Currently Being ModeratedMay 18, 2012 8:53 PM (in response to Philip Keller)
Somebody tell this newbie what ALL of the above means??!! I am having a similar problem. I have a WD external drive... was working great, and all of a sudden, BAM! Stopped working! Now my mac pro does not even recognize it! I just don't get it! Please! I have VERY important files on that drive and I can't read them at all! What can I do to fix this problem??!!
Any help is welcomed and appreciated before I take the mac to the apple store "/ Very unhappy indeed! My mac is barely even a year old!
Thanks so much,
Currently Being ModeratedMay 19, 2012 3:26 AM (in response to Zilacr7)
Liza is your WD USB drive powered by only the USB port, it has no AC adapter?
If it is one of those type drives they have been known to fail and or for some reason not get enough power from only plugging them into one USB port. to supply more power to them you may need a Y USB cable that connects to two USB ports at the same time.
Then again if the drive has failed it may not be the Drive itself but the USB electronics in the Enclosure the drive is in. Taking the drive out of the enclosure and using a SATA or IDE to USB Adapter that has its own AC adapter to power the drive will allow you to access it and get the files off it.
Be advised that any and all external drive should only be used as a Back Up for files that are contained on your internal drive and or on some other external drive. Making sure you have at least 2 copies of all your important files.
Currently Being ModeratedMay 21, 2012 1:31 AM (in response to Zilacr7)
Your problem is unrelated to mine; it's way more fundamental. If you have an Apple store near you, you might want to go there to get some help diagnosing the problem. Good luck.
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