Binary Nandwrite/read to Flash

[Ricard Wanderlof]

On Thu, 13 Mar 2008, Manuel Sahm wrote:

>>> Is it possible to write/read to the NAND flash "directly" without an 
>>> partition ?(/dev/mtdX) ?
>> 
>> No, but you can set up a /dev/mtdX device to span the whole device, even if 
>> you then have additional /dev/mtdX devices which refer to partitions.
>> 
> it´s very dangerous, because if I use the wrong address I´ll kill my system 
> :-)
>
> Is ther a possibility to make the /dev/mtdX read only (write protected) ?

Yes, in the driver that registers the flash with mtd you can specify that 
the partition should be read only. However, as far as I know [someone 
please correct me if I'm wrong] this can then not be changed while the 
system is running, so it's not possible to write or erase the partition 
without rebooting.

/Ricard
--
Ricard Wolf Wanderlöf                           ricardw(at)axis.com
Axis Communications AB, Lund, Sweden            www.axis.com
Phone +46 46 272 2016                           Fax +46 46 13 61 30