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I'm not sure exactly how my EEE PC got to this point, but I have Backtrack (an Ubuntu-based distro) on the SD card, and a few different Ubuntu LiveUSB distros on different USB memory sticks. If both the SD card and any of the USB sticks are present, the system will present a GRUB boot menu which seems to be the built-in EEE PC one--it has the "reset to factory defaults" option--but all options will boot Backtrack, even after claiming to reset to factory defaults.

If either the USB stick, the SD card, or both are missing, I get a Grub error 21 at boot. Not sure quite how to un-hose this; I'd just like to put a conventional netbook Ubuntu on the built-in SSD, but I can't trivially do that from Backtrack 4.

hildred
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user3019
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  • Is there a BIOS setting to control boot order? Fiddling with it might solve your problem. Otherwise try running `grub-install`, perhaps after writing the [device map](http://www.gnu.org/software/grub/manual/grub.html#Device-map) (I don't know what would work offhand). [Boot Info Script](http://sourceforge.net/projects/bootinfoscript/) may help your diagnosis, [more about it](http://ubuntuforums.org/showthread.php?t=1291280). – Gilles 'SO- stop being evil' Dec 09 '10 at 19:29
  • I have tried all possible boot order variations in the BIOS; none affects the error 21 outcome. The device map should only be relevant to legacy systems, but that boot info script may be useful, thanks. – user3019 Dec 09 '10 at 19:33

1 Answers1

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It's a wrong setup of GRUB. Reinstall it on ssd, using uuids for booting from SD and you'll be ok.

I recommend you to install grub2 though, because it handles these situations better.

admiral0
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