* MLC NAND support in JFFS2
@ 2007-05-08 7:20 Stanley Cai
2007-05-08 7:39 ` Artem Bityutskiy
0 siblings, 1 reply; 4+ messages in thread
From: Stanley Cai @ 2007-05-08 7:20 UTC (permalink / raw)
To: linux-mtd
hi
Does the current JFFS2 support MLC NAND? If not, is there any plan
to support it?
--
Best regards,
-stanley
http://pxa-linux.sf.net -- PXA Linux information centre
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: MLC NAND support in JFFS2
2007-05-08 7:20 MLC NAND support in JFFS2 Stanley Cai
@ 2007-05-08 7:39 ` Artem Bityutskiy
[not found] ` <dd2695e90705080132h234b7389x37762c4884047cb0@mail.gmail.com>
0 siblings, 1 reply; 4+ messages in thread
From: Artem Bityutskiy @ 2007-05-08 7:39 UTC (permalink / raw)
To: Stanley Cai; +Cc: linux-mtd
On Tue, 2007-05-08 at 15:20 +0800, Stanley Cai wrote:
> hi
> Does the current JFFS2 support MLC NAND? If not, is there any plan
> to support it?
I do not think there is a huge problem to support it. Just do not use
cleanmarker and everything will be fine. Or waste first NAND page for
cleanmarker. Both approaches have their drawbacks, but easy and should
work.
--
Best regards,
Artem Bityutskiy (Битюцкий Артём)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: MLC NAND support in JFFS2
[not found] ` <dd2695e90705080132h234b7389x37762c4884047cb0@mail.gmail.com>
@ 2007-05-08 8:48 ` Artem Bityutskiy
2007-05-08 21:38 ` Charles Manning
0 siblings, 1 reply; 4+ messages in thread
From: Artem Bityutskiy @ 2007-05-08 8:48 UTC (permalink / raw)
To: Stanley Cai; +Cc: linux-mtd
On Tue, 2007-05-08 at 16:32 +0800, Stanley Cai wrote:
> hi
> I find that some vendor's MLC NAND such as Samsung require the user
> programs the pages in the same block in sequence from least
> significant page to most significant page. i think current JFSS2 can
> not do this now.
Please, no private mails.
This was a requirement for SLC flashes as well, at least Toshiba's data
sheets noted this. JFFS2 satisfies this requirement.
--
Best regards,
Artem Bityutskiy (Битюцкий Артём)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: MLC NAND support in JFFS2
2007-05-08 8:48 ` Artem Bityutskiy
@ 2007-05-08 21:38 ` Charles Manning
0 siblings, 0 replies; 4+ messages in thread
From: Charles Manning @ 2007-05-08 21:38 UTC (permalink / raw)
To: linux-mtd, dedekind; +Cc: Stanley Cai
On Tuesday 08 May 2007 20:48, Artem Bityutskiy wrote:
> On Tue, 2007-05-08 at 16:32 +0800, Stanley Cai wrote:
> > hi
> > I find that some vendor's MLC NAND such as Samsung require the user
> > programs the pages in the same block in sequence from least
> > significant page to most significant page. i think current JFSS2 can
> > not do this now.
>
> Please, no private mails.
>
> This was a requirement for SLC flashes as well, at least Toshiba's data
> sheets noted this. JFFS2 satisfies this requirement.
I think the bigger issue is supporting multi-bit error correction via BCH. The
current 1-bit correcting Hamming code is inadequate for MLC.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-05-08 21:31 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2007-05-08 7:20 MLC NAND support in JFFS2 Stanley Cai
2007-05-08 7:39 ` Artem Bityutskiy
[not found] ` <dd2695e90705080132h234b7389x37762c4884047cb0@mail.gmail.com>
2007-05-08 8:48 ` Artem Bityutskiy
2007-05-08 21:38 ` Charles Manning
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