From: Peter Barada <peter.barada@gmail.com>
To: linux-mtd@lists.infradead.org
Subject: Re: What does oob stand for in mtd.h?
Date: Sat, 06 Dec 2014 01:36:55 -0500 [thread overview]
Message-ID: <5482A407.4070002@gmail.com> (raw)
In-Reply-To: <54827EEB.7030305@gmail.com>
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@gmail.com
next prev parent reply other threads:[~2014-12-06 6:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-06 3:58 What does oob stand for in mtd.h? nick
2014-12-06 6:36 ` Peter Barada [this message]
2014-12-06 10:55 ` Richard Weinberger
2014-12-07 1:43 ` nick
2014-12-07 10:36 ` Rafał Miłecki
2014-12-07 13:23 ` nick
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