On Friday 27 October 2006 07:03, Ben Combee wrote:
> I'm looking at using YAFFS2 on a 256MB flash part where we'll be
> setting up Linux with a 56MB system partition and a 200MB user
> partition.  We need to do this to protect the system, since there's no
> way to keep the user from filling the flash, and we need to reserve
> some space for the system services and component updates.
>
> Would it be better to just go with a 256MB partition and setup the
> user space as a preallocated loop-mounted file?  That would allow
> wear-leveling to work for the entire part, but I think the
> inefficiencies of putting another file system on top of YAFFS2 would
> be pretty high.

For almost all applications, wear levelling is not a concern on YAFFS.

I would suggest that the best way to approach this problem is to use two YAFFS  
partitions.

>
> I didn't see any sort of "reserve space for root" feature in YAFFS2
> that some other filesystems have.  Did I miss something obvious?

There is no such feature in YAFFS.  It could be added, but I'm not sure that 
the pain is worth the gain.

-- CHarles