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I have two computers, both on Ubuntu, and I need to upgrade the BIOS on one of them. I can get a version of DOS and also use UNetBootin with FreeDOS, but I can't copy the BIOS firmware and flash utility to the key because

  1. The USB device is 16GB, thus cannot seem be read from DOS
  2. The DOS/FreeDOS images don't have enough free space to copy the files

I could try and use a CD to burn the BIOS files, unfortunately I don't have any at hand at the moment (and would need to be a CDR-W as it seems a waste to burn 2.2MB on a 640MB device... to be discarded after, too!)

That being said, I have tried...

  • ...to repartition the USB device, with no luck.
  • ...using dd to copy the ISO (and even an IMG) over the USB device
  • ...directly accessing the USB device from DOS/FreeDOS

No success.

Is it even possible? With USB devices being bigger and bigger, finding a DOS-compatible one seems like a futile initiative, no? Any ideas?

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Download this file I've made for you:

wget http://artinvoice.hu/FreeDOS-1.1-memstick-2-256M.img

After that take a pendrive bigger or equal to 256Mb, and use dd to transfer the image to the pendrive. Be careful, it will destroy all your data on the pendrive, afterwards you have to repartiton it!

The command is: 

dd if=FreeDOS-1.1-memstick-2-256M.img of=/dev/sdb

if the pendrive is under /dev/sdb, if not, adjust the command to fit your system.

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  • Thank you, I will try this file. How did you create it?
    – Yanick Rochon
    Oct 9, 2014 at 15:59
  • Well, it works! Now, if you can provide how you created the img file, this will be it.
    – Yanick Rochon
    Oct 9, 2014 at 16:19
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    I'm glad that works. Hmm... It doesn't deserve at least an upvote? :)
    – Frantique
    Oct 10, 2014 at 6:45

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