Hello,
I have experience with installing to an external thumb drive, so I guess I'll reply.

It is easiest to start with a fresh install onto your external drive.
Boot up your machine with the installer, like you were going to install to your normal internal drive, but during the partitioning phase, leave the internal drive alone and only work with the external drive. I always do the partitioning using the custom partitioning scheme because I don't want to trust it to the installer.
After partitioning, you come to the "Boot Loader Configuration"

https://fermilinux.fnal.gov/distribution/slf-5/installation/boot.loader.configuration.html

Click on "Configure advanced boot loader options" and click "Next"
At the advanced screen, click on "Change Drive Order"
On that screen, rearange the drive order so that your external drive is first in the list. Click "OK" Then double check to make sure that
"Master Boot Record (MBR)" is checked.
Then click "Next"

And then proceed like a normal install.

Then if your machine is able to boot off an external USB device, it should be able to boot off the external drive that you just installed on.

Troy

suhaiL khan wrote:
Hello all
Nobody responded to this mail. I also want to know this possibility.
Any help is thankfully appreciated.

--- On *Tue, 25/5/10, Francis Ogula /<[email protected]>/* wrote:


    From: Francis Ogula <[email protected]>
    Subject: how can I boot sl54 from external hd?
    To: [email protected]
    Date: Tuesday, 25 May, 2010, 3:07 PM

    Hello all, I have just installed SL54 on my  transcend external 235
    GB hardrive.My internal hd has windows xp. However, My PC bios
    cannot boot from USB. I installed grub to the mbr but it was unable
    to boot either the linux or windows OS. I tried installing grub on
    the external hd linux partition and attemped to boot it on a hp
    laptop whose BIOS does support usb booting, but it only went as far
    as GRUB_. Is it really possible to boot SL from an external HD? any
help will be appreciated



--
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Troy Dawson  [email protected]  (630)840-6468
Fermilab  ComputingDivision/LSCS/CSI/USS Group
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