Re: [Mactel-linux-users] Booting From USB Drive

[Geoffrey <li...@se...>]

cyberdork33 wrote:
> 
> On Aug 25, 2009, at 2:13 PM, Geoffrey wrote:
> 
>> Stefan Monnier wrote:
>>>>>> Is it possible to boot Linux from a USB drive without modifying 
>>>>>> the Mac?
>>>>> In theory, it is possible: all Intel Macs can boot from USB (AFAIK).
>>>>> But the legacy BIOS in those Macs does not support booting from USB.
>>>>> So you'll have to boot using EFI.
>>>>> I've been trying to do that on-and-off, in the hope to get my trusty
>>>>> "rescue USB key" to also work on my Macbook Pro, but until now I 
>>>>> haven't
>>>>> had much success, tho it seems that some people do get to boot 
>>>>> Linux via
>>>>> EFI on their Mac.
>>>>> Any information about this would be welcome,
>>>> I have used rEFIt for this purpose: http://refit.sourceforge.net/
>>>
>>> rEFIt doesn't boot Linux.  So it's not a solution to this problem.
>>
>> Um, unless I mis-understand what you're saying, that's not correct.  I'm
>> booting Linux via rEFIt.  Or are you saying you can't boot Linux from a
>> USB device via rEFIt?
> 
> rEFIt doesn't "boot" Linux, it is just an interface to the standard 
> Apple-supplied EFI... and it will not boot in legacy mode from USB or 
> firewire. Therefore you have to boot Linux in EFI mode which requires 
> GRUB-EFI or ELILO. I have only had success with GRUB-EFI.

I am using neither ELILO or GRUB-EFI.  I'm using stock grub with rEFIt.

> 
> http://grub.enbug.org/TestingOnMacbook
> 
> Lot's of testing info...
> http://ubuntuforums.org/showthread.php?t=995704
> 
>>
>>>> Just plug in the USB stick prior to booting and an additional icon
>>>> will show up on the initial selection.
>>>
>>> What USB stick?  What do you need to put on it?
>>>
>>> This said, I have finally managed to get Grub2's EFI support to work.
>>> Incidentally, I do use rEFIt on top of Grub2 (basically, I use rEFIt to
>>> choose between Grub2-ia32 and Grub2-amd64, since rEFIt luckily uses
>>> a fat-binary whereas Grub2 doesn't).
>>>
>>>
>>>        Stefan
>>>
>>>
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>>
>>
>> -- 
>> Until later, Geoffrey
>>
>> Those who would give up essential Liberty, to purchase a little
>> temporary Safety, deserve neither Liberty nor Safety.
>>  - Benjamin Franklin
>>
>> ------------------------------------------------------------------------------ 
>>
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>> trial. Simplify your report design, integration and deployment - and 
>> focus on
>> what you do best, core application coding. Discover what's new with
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> 
> 


-- 
Until later, Geoffrey

Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety.
  - Benjamin Franklin