What does oob stand for in mtd.h?

[Peter Barada]

On 12/05/2014 10:58 PM, nick wrote:
> Greetings MTD subsystem developers,
> I am wondering what oob stands for in mtd.h as a lot of functions are using it in their names. This would greatly need in me understanding the core of this subsystem if something points out what this stands for.
>
"Google is your friend". :)

A search for "NAND oob" turns up multiple URLs that can shed light on
the meaning of OOB in the context of a NAND device.

But to suffice, OOB = "Out Of Band" meaning the bytes of "extra" sotrage
read/written with every page access of a NAND device (aka the "spare
area" of each page).  Usually the OOB area contains ECC bytes (to
correct the NAND in the case of a bit flip during read), and probably
metadata (used by YAFFS and other NAND-based filesystems).

-- 
Peter Barada
peter.barada at gmail.com