* JFFS2 ECC options
@ 2006-09-05 12:37 Davide CASCONE
2006-09-14 16:32 ` Justin Treon
0 siblings, 1 reply; 3+ messages in thread
From: Davide CASCONE @ 2006-09-05 12:37 UTC (permalink / raw)
To: linux-mtd
I'm working with JFFS2 on a NAND device. In order to disable the software ECC is it enough to set the mtd field "nand.eccmode" to "NAND_ECC_NONE"?
If I do this, I have some CRC errors if JFFS2 file system includes a bad block. Is it right? Does the CRC check depend on the ECC options?
In order to use the summary support, is it enough to set the macro "CONFIG_JFFS2_SUMMARY" in the file ".config"? Do I have to re-make the file system image (that I create using the mkfs.jffs2 utility) in order to use it with the summary support?
Thanks in advance,
Davide
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: JFFS2 ECC options
2006-09-05 12:37 JFFS2 ECC options Davide CASCONE
@ 2006-09-14 16:32 ` Justin Treon
2006-09-14 17:04 ` dedekind
0 siblings, 1 reply; 3+ messages in thread
From: Justin Treon @ 2006-09-14 16:32 UTC (permalink / raw)
To: Davide CASCONE, linux-mtd
> I'm working with JFFS2 on a NAND device. In order to
> disable the software ECC is it enough to set the mtd
> field "nand.eccmode" to "NAND_ECC_NONE"?
> If I do this, I have some CRC errors if JFFS2 file
> system includes a bad block. Is it right? Does the
> CRC check depend on the ECC options?
>
> In order to use the summary support, is it enough to
> set the macro "CONFIG_JFFS2_SUMMARY" in the file
> ".config"? Do I have to re-make the file system
> image (that I create using the mkfs.jffs2 utility)
> in order to use it with the summary support?
>
I have no idea about your first question. You may
want to ask it again.
Regarding summary support I have never been able to
make a jffs2 filing system that used summary support
with the mkfs.jffs2 tool that worked. I create the
filing system with summary support on an empty chip
and then transfer the files. Please let me knhwo if
you get it to work with the mkfs.jffs2 tool.
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: JFFS2 ECC options
2006-09-14 16:32 ` Justin Treon
@ 2006-09-14 17:04 ` dedekind
0 siblings, 0 replies; 3+ messages in thread
From: dedekind @ 2006-09-14 17:04 UTC (permalink / raw)
To: justin_treon; +Cc: linux-mtd, davide.cascone
>I have no idea about your first question. You may
>want to ask it again.
>
>Regarding summary support I have never been able to
>make a jffs2 filing system that used summary support
>with the mkfs.jffs2 tool that worked. I create the
>filing system with summary support on an empty chip
>and then transfer the files. Please let me knhwo if
>you get it to work with the mkfs.jffs2 tool.
Yeah, it makes a lot of sense not integrate the "sumtool" stuff
and mkfs.jffs2.
Nevertheless, it would prabably be nice if you sent a bugreport if
it doesn't work.
Artem.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2006-09-05 12:37 JFFS2 ECC options Davide CASCONE
2006-09-14 16:32 ` Justin Treon
2006-09-14 17:04 ` dedekind
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