Currupted USB Drive with dd - Proper Usage?
David Hunt
david.hunt.linux at comcast.net
Sun May 23 11:48:32 UTC 2004
David Hunt wrote:
> I was trying to create a bootable USB drive using the diskboot.img
> file under /images in FC2 disc1. I had already done something similar
> with FC1, but didn't document it. So I have used this drive to
> install FC1. I know it is possible.
>
> I originally just copied the files to the usb drive using cp after
> mounting the image. That seemed to copy OK. But since the readme file
> indicated that dd should be used, I decided to start from scratch, and
> document the entire thing.
>
> I found a thread about using dd on the test-list and tried the same
> command string. Assuming that I have mounted the disc1 iso at
> /mnt/cdrom, and the usb drive is located at /dev/sda, with sda1 being
> a bootable VFAT partition, verified with sfdisk, the command is...
>
> "dd if=/mnt/cdrom/images/diskboot.img of=/dev/sda1". The bad thing is
> that it doesn't copy the files in the image, instead it created over
> 4000 files and directories of just plain garbage. Can anyone tell me
> how to use dd properly to transfer the contents of the image to the
> usb drive? Or, why dd should be used at all? Why was dd recommended if
> just copying the files would work?
>
> Feeling foolish, and wanting some guidance.
>
Found the problem. I still had /dev/sda1 mounted when I issued the dd
command. umount first, and it works OK.
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