From: "Jörn Engel" <joern@wohnheim.fh-wedel.de>
To: "Artem B. Bityutskiy" <dedekind@yandex.ru>
Cc: zhao forrest <zhao_fusheng@hotmail.com>, linux-mtd@lists.infradead.org
Subject: Re: [PATCH]erase block header(revision 4)
Date: Sun, 9 Oct 2005 12:35:55 +0200 [thread overview]
Message-ID: <20051009103555.GA32487@wohnheim.fh-wedel.de> (raw)
In-Reply-To: <4348C169.2050907@yandex.ru>
On Sun, 9 October 2005 11:06:17 +0400, Artem B. Bityutskiy wrote:
> zhao forrest wrote:
> > It's true that "c->cleanmarker_size was 0" for NAND flash.
> > But besides NAND flash, "c->cleanmarker_size was 0" is also true
> > for dataflash. That means that cleanmarker was not needed for
> > dataflash for some reason that I don't know :)
>
> DataFlash is has a minimum IO unit (DataFlash block, 528/1056 AFAIR),
> and has no OOB. So the cleanmarker would consume the whole DataFlash
> block which considered wasteful I suppose.
Is it possible for dataflash to erase a block, power cycle before
erase has completed, and later write to this block before erasing it
again?
Cleanmarkers are the means to prevent above events from happening. If
dataflash has some other means, we can dump cleanmarkers. If not,
dumping them would be a reliability problem.
Jörn
--
Everything should be made as simple as possible, but not simpler.
-- Albert Einstein
next prev parent reply other threads:[~2005-10-09 10:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-03 13:40 [PATCH]erase block header(revision 4) zhao forrest
2005-10-03 13:50 ` Artem B. Bityutskiy
2005-10-03 14:28 ` Jörn Engel
2005-10-03 14:43 ` Artem B. Bityutskiy
2005-10-03 14:49 ` Jörn Engel
2005-10-09 6:08 ` zhao forrest
2005-10-09 7:06 ` Artem B. Bityutskiy
2005-10-09 10:35 ` Jörn Engel [this message]
2005-10-03 14:42 ` Jörn Engel
-- strict thread matches above, loose matches on Subject: below --
2005-09-28 7:33 zhao forrest
2005-09-30 1:15 ` root
2005-09-30 11:29 ` Jörn Engel
2005-10-03 11:23 ` Jörn Engel
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