problem with dd and usb drive

[Kahn Seidl]

the thing is, that I did use fdisk, and no matter what I did, the partition 
table wouldnt stay.  i then plugged it into a windows machine, and, explorer 
crashed, and wouldnt read anything everytime i plugged it in.  it found a 
new harddrive.

i would add it to just one file but, ...  it is fat32 , so no files above 4~ 
gb

but, it may just work anyway.  is there way I can break it up into 2 files?

thanks, martin


>From: Craig White <craigwhite at azapple.com>
>Reply-To: For users of Fedora Core releases <fedora-list at redhat.com>
>To: fedora-list at redhat.com
>Subject: Re: problem with dd and usb drive
>Date: Fri, 18 Nov 2005 12:07:42 -0700
>
>On Fri, 2005-11-18 at 18:55 +0000, Kahn Seidl wrote:
> > I have a problem, i have a fat32 usb drive, which im using to back up a 
>dns
> > server.
> >
> > i first started to use cp -r * /mnt/usbdrive
> >
> > then i stopped, and wanted to do it a better way
> >
> > so i did a dd if=/dev/hda1 of=/dev/sda1 bs=1024k
> >
> > it finishes too quickly and says 47+1 in    47+1 out
> >
> > and now when i ls the /mnt/usbdrive
> >
> > I get all sorts of garbage, lots of ?s and such.  and numbers.  when i 
>try
> > to delete it, it says its a read only drive.
> >
> > also to note, that at first, fdisk said there was one partition as 
>fat32.
> > nwo there are several and i have no idea how they got there.
> >
> > the last thing is this - i can now not umount the /dev/sda1  it says the
> > device is busy, eject doesnt work either.  I turned it off, and i still 
>cant
> > unmount it, what should I do?  i really dont want to reboot it, it is 
>our
> > dns server.  so?
> >
>----
>I hope that there wasn't anything on the dos partition that you wanted
>to keep since it is now toast.
>
>running dd like that did what you told it to do...over writing
>the /dev/sda1 partition with a copy of whatever was on /dev/hda1
>
>I suppose issuing the 'mount' command would tell you what was
>on /dev/hda1
>
>You probably have no choice but to clean up the usb drive with fdisk...
>
>fdisk /dev/sda
>as at least the first partition has been clobbered.
>
>h # help
>p # print (though this might be phony since it will read the
>            partition table and the contents may not match)
>
>Craig
>
>PS...You might have had an easier time of it if you had just done...
>
>dd if=/dev/hda1 of=/dev/sda1/backup_device_hda1.dd-file
>
>Craig
>
>
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