Re: OT: Compact flash working on PC but not on Camera


"Rob Morley" <nospam@xxxxxxxxxxxx> wrote in message
news:MPG.1dc35548fc192bec989aed@xxxxxxxxxxxxxxxxxxxxxx
> In article <djbbcq$31j$1@xxxxxxxxxxxxxxxxxxxxx>, nospam@xxxxxxxxxxxxxxx
> says...
> <snip>
>> I have now tried formatting from DOS within Windows XP, whilst the format
>> went OK, it did not resolve the problem.
>
> The command prompt in Windows XP isn't DOS - try booting from a
> Windows98 boot floppy.
>>
>> I also though of using Norton Ghost to clone my working 32Mb card onto
>> the
>> 512Mb card, and then when accepted in the camera, format again to get
>> back
>> to 512Mb with the camera. Unfortunately, Ghost does not see the card
>> reader!
>
> That would have been good if it worked.
>>
>> So, I have now downloaded a Linux distro, Knoppix V4.02. I was impressed
>> that it immediately located the card reader. I found my way to the Linux
>> shell console. Entered the commands given by yourself and these were
>> accepted. The system then accessed the CD as if something was going to
>> happen and then......nothing. System frozen and clock stopped at 7:01pm.
>>
>> Perhaps someone can give me the exact commands to enter.
>> The compact flash drive shows as: sdb1 on the Linux desktop.
>>
> /dev/sdb1 is the first partition on the CF, rather than the raw device
> which will be /dev/sdb. When you did the dd it wrote off the end of the
> CF memory (because it didn't start at the beginning) and over something
> else. The exact count you need may not be the one that I gave anyway -
> 1024 x 1024 x 512 may not be the exact size of your CF memory. It may
> be that you only need to zero the first kilobyte or so to wipe the
> partition table, so try something like
> dd if=/dev/zero of=/dev/cf bs=512 count=2
> and work up from there.

Thanks again Rob,

I would try the Win98 boot disk but my card reader did not come with any DOS
drivers.
I will try a format from within Windows 98 over the weekend on a pals
machine to see if that helps at all.

Entering:
dd if=/dev/zero of=/dev/sdb bs=512 count=2

gives the following error:
dd: opening '/dev/sdb': Permission Denied

At least that's a step forward from locking the PC!
Seriously, any further help gratefully accepted and much appreciated.



.

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