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 Post subject: Copying mbr.bin error
PostPosted: Mon Jan 03, 2011 7:16 pm 
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Joined: Mon Jan 03, 2011 6:50 pm
Posts: 1
Just wanted to report an error I encountered when following the procedure to make the UBCD USB in Linux... namely, that the command described below would muck up my file system making syslinux not recognize it:

"4. Now, we write the syslinux mbr to the USB drive.
The mbr.bin file is located in ./ubcd/tools/linux/ubcd2usb/ of the extracted UBCD iso.

dd if=mbr.bin of=/dev/sdX (replacing X with your USB key drive letter)"

The above command wrecks the FAT file system I just set up whenever I run it causing an error wherein block sizes are irregular and producing an unmountable and generally unusable disk (until repartitioned and reformatted). I worked around the problem simply by copying the file to the base directory in the GUI. Is this a previously known error? Can I get a gold star or something?


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 Post subject: Re: Copying mbr.bin error
PostPosted: Tue Jan 04, 2011 5:24 am 
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Joined: Fri Jan 11, 2008 2:52 pm
Posts: 1278
I probably should change the instrucitions too:
Code:
dd if=./ubcd/tools/linux/ubcd2usb/mbr.bin of=/dev/sdX bs=440 count=1

This will prevent that too many bytes are overwritten if mbr.bin would be longer than 440 bytes (it normally isn't).

How did you format your USB drive?
Did you make your filesystem on the whole drive (it looks like that) or did you create the filesystem on a partition of that drive?

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 Post subject: Re: Copying mbr.bin error
PostPosted: Thu Jan 06, 2011 11:11 pm 
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Joined: Tue Sep 09, 2008 4:37 pm
Posts: 462
Location: California, USA
@Icecube
Should I change the tutorial to reflect these parameters as a precaution?


dragoon3428 wrote:
Can I get a gold star or something?

Image

:D

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Please check your UBCD ISO MD5 Hash Sum; May prevent issues later on by not having an exact copy.

Currently Working on Common Issues and Repair Tips on the Wiki.


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