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From: "JohnsonCheng" <johnsoncheng@qnap.com.tw>
To: "'Alex Zeffertt'" <ajz@cambridgebroadband.com>
Date: Thu, 25 Aug 2005 10:59:15 +0800
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Cc: linuxppc-embedded@ozlabs.org
Subject: RE: Linux Kernel MTD question
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Good idea. It works well.
The latest version of mtd utility for erase flash is flash_eraseall.

Thank you very much,
Johnson Cheng

-----Original Message-----
From: Alex Zeffertt [mailto:ajz@cambridgebroadband.com] 
Sent: Wednesday, August 24, 2005 4:50 PM
To: JohnsonCheng
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Linux Kernel MTD question

Before doing a write to /dev/mtd1 try running 
~# eraseall /dev/mtd1

(eraseall is from the mtd-utils package.)

Alex


On Wed, 24 Aug 2005 13:02:31 +0800
"JohnsonCheng" <johnsoncheng@qnap.com.tw> wrote:

> Dear Ricardo and Wolfgang,
> 
> Very thanks for your kindly support.
> I am sorry I made a mistake.
> Before you mount /dev/mtdblock4, you have to use mke2fs to format it.
> Now I think my MTD function is almost ready, except write.
> When I run "dd if=/dev/mtd1 of=kernel.img", it's OK.
> But when I run "dd if=kernel.img of=/dev/mtd1", it's failed. No error
> message printed, and the process time is shortly, cause Bad CRC.
> 
> Thanks,
> Johnson Cheng
> 
> -----Original Message-----
> From: linuxppc-embedded-bounces@ozlabs.org
> [mailto:linuxppc-embedded-bounces@ozlabs.org] On Behalf Of Ricardo Scop
> Sent: Wednesday, August 24, 2005 3:17 AM
> To: JohnsonCheng; 'Robert P. J. Day'
> Cc: linuxppc-embedded@ozlabs.org
> Subject: Re: Linux Kernel MTD question
> 
> Hi Johnson,
> 
> On Tuesday 23 August 2005 02:31, JohnsonCheng wrote:
> > It doesn't work, too.
> > Error message: Invalid argument.
> Well, do you have an mtdblock4 entry in /dev?
> 
> Also, you should specify your filesystem type to mount, like in:
> 
> mount -t jffs2 /dev/mtdblock4 /mnt
> 
> BTW, -t jffs2 is just an example.
> 
> HTH,
> 
> -Scop.
> 
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