On Mon, Mar 07, 2011 at 02:03:15PM +0100, Loïc Minier wrote:
> On Mon, Mar 07, 2011, Shawn Guo wrote:
> > proc umounted
> > /dev/sdb: No medium found
> > 
> > sfdisk: cannot open /dev/sdb read-write
> 
>  Hmm that's really bad; the only thing that I can think of is that your
>  device goes away for some time after the empty partition table is
>  created, and so the sfdisk call comes too soon; could you try this on
>  your MMC:
>     parted -s /dev/sdN mklabel msdos && sfdisk -L /dev/sdN

$ sudo parted -s /dev/sdb mklabel msdos && sfdisk -L /dev/sdb
/dev/sdb: Permission denied

sfdisk: cannot open /dev/sdb read-write

>  if sfdisk fails when called immediately after parted, it probably means
>  we have to poll for readyness of /dev/sdN before calling sfdisk.
> 

-- 
Regards,
Shawn


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