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afterdawn.com > forums > software, operating systems and more > linux - general discussion > error 21 with linux ubuntu 8.04 1
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error 21 with Linux Ubuntu 8.04 1
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redice
Senior Member
_ 		14. September 2008 @ 16:40 _ Link to this message    Send private message to this user   
i installed Ubuntu 8.04 on my usb enclosed hard drive. so now i have a dual boot with windows xp/Ubuntu 8.041. now i was able to use Ubuntu 8.041 after it was done installing but after i shut down the computer and boot back up again i get
Grub loading stage 1.5

Grub loading please wait.....
Error 21

how can i fix this problem?
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varnull
Suspended permanently
_ 		14. September 2008 @ 16:54 _ Link to this message    Send private message to this user   
Error 21 means "Can not find disk"

Is it plugged in?
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redice
Senior Member
_ 		14. September 2008 @ 17:13 _ Link to this message    Send private message to this user   
yes its plugged in.
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varnull
Suspended permanently
_ 		14. September 2008 @ 17:21 _ Link to this message    Send private message to this user   
can your hardware boot from usb? is grub configured properly? usb will be /dev/sda1-2-3-4-5-6 depending...
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redice
Senior Member
_ 		14. September 2008 @ 17:38 _ Link to this message    Send private message to this user   
Originally posted by varnull:
 can your hardware boot from usb? is grub configured properly? usb will be /dev/sda1-2-3-4-5-6 depending...
i am new to this whole linux thing so you if you don't mind can you tell me how i would go about grub configured properly? thanks
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varnull
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_ 		14. September 2008 @ 20:00 _ Link to this message    Send private message to this user   
https://help.ubuntu.com/community/GrubHowto

It relates to ubuntu.. look at the ubuntu wiki and forums first before asking.. like me they love saying RTFM ;)
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redice
Senior Member
_ 		14. September 2008 @ 20:08 _ Link to this message    Send private message to this user   
ok thanks will look at the link.
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OzMick
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_ 		15. September 2008 @ 14:41 _ Link to this message    Send private message to this user   
You might need to assign a UUID and replace the /dev/sdxx entry in grub with that. USB devices can change their nodes unpredictably, but UUIDs or drive labels don't. There should be loads of info on how to do that out there.
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redice
Senior Member
_ 		15. September 2008 @ 22:18 _ Link to this message    Send private message to this user   
Originally posted by OzMick:
 You might need to assign a UUID and replace the /dev/sdxx entry in grub with that. USB devices can change their nodes unpredictably, but UUIDs or drive labels don't. There should be loads of info on how to do that out there.
ok thanks. i will look into that.
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