[U-Boot] Q: nand usage

[Scott Wood]

On Fri, 18 Mar 2011 11:54:43 -0700
ran shalit <ranshalit at gmail.com> wrote:

> 
> 
> 
> wd wrote:
> > 
> > 
> >> I think my question was not very well expressed. I ment to ask about the
> >> mapping of the partitions inside the NAND: Does each partitions need some
> >> spare blocks (padding block) becuase of the bad block skipping in the
> >> Nand ?
> >> As I said, I did not find any information about the strategy of mapping
> >> partitions in the Nand. 
> > 
> > As you are talking about partitions, I assume you refert to the MTD
> > partitioning.  In this case the bad block handling needs to be done in
> > by the file system code, when you create a file system insinde one of
> > the partitions.
> > 
> > [Note that this differs from UBI, where bad block handling is done for
> > the whole device, independent of the volumes that you create on top of
> > it.]
> > 
> > 
> 
> Sorry, I probably use the wrong terms in my question. I do not mean
> partition using file system,
> but just saving files using the u-boot interface, for example saving the
> kernel file in some space in the NAND and for the u-boot file in another
> space in the NAND, and all done with the given write command in the uboot
> (nand write...). And again with this u-boot interface I still need some
> strategy for deciding where to put each file.

Yes, when placing raw files in NAND, you want to leave some space for bad
blocks.

-Scott