Oddities with MTD/DOC

Oddities with MTD/DOC

[Jason Walker]

Just a question for you all: Have you ever had a DOC just *not* work
anymore?  After formatting/installing my software on one for about 10-20
times, the device refuses to be recognized by the kernel. I have a stack of
boxes that are in this state now.  Do I have to do some kind of low level
format to them? I can't even fdisk them.  I would have a hard time believing
these are all just faulty.  Any insight on this?

Jason Walker
Network Engineer
US Wireless Online
www.uswo.net

Re: Oddities with MTD/DOC

[Ollie Lho]

Jason Walker wrote:
> 
> Just a question for you all: Have you ever had a DOC just *not* work
> anymore?  After formatting/installing my software on one for about 10-20
> times, the device refuses to be recognized by the kernel. I have a stack of
> boxes that are in this state now.  Do I have to do some kind of low level
> format to them? I can't even fdisk them.  I would have a hard time believing
> these are all just faulty.  Any insight on this?
> 

It happens a lot. You got two options: 1. replace it with another,
2. wait a few days, sometimes it just come back "magically".

Ollie

Re: Oddities with MTD/DOC

[David Woodhouse]

ollie@sis.com.tw said:
>  It happens a lot. You got two options: 1. replace it with another, 2.
> wait a few days, sometimes it just come back "magically". 

Eep. Complete death of the hardware? That's not good. How can it happen?

I assume that if it's a DiskOnChip Millennium you've tried probing without 
the CONFIG_DOCPROBE_55AA option, in case it's just overwritten the start of 
the flash?

--
dwmw2

Re: Oddities with MTD/DOC

[Shuh C Chang]

If you have the M-System's DOS utility (downloadable), then try this:

docpmap /e

and see if it would wipe out the whole DOC and allows you to re-format again
using dformat (another DOS utility from M-System).  After that, try it in
Linux and see if it recognizes the DOC again.

Shuh Chang


----- Original Message -----
From: "Jason Walker" <jasonw@uswo.net>
To: "MTD Mailing List" <linux-mtd@lists.infradead.org>
Sent: Tuesday, May 08, 2001 6:38 PM
Subject: Oddities with MTD/DOC


> Just a question for you all: Have you ever had a DOC just *not* work
> anymore?  After formatting/installing my software on one for about 10-20
> times, the device refuses to be recognized by the kernel. I have a stack
of
> boxes that are in this state now.  Do I have to do some kind of low level
> format to them? I can't even fdisk them.  I would have a hard time
believing
> these are all just faulty.  Any insight on this?
>
> Jason Walker
> Network Engineer
> US Wireless Online
> www.uswo.net
>
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
>

RE: Oddities with MTD/DOC

[Vadim Khamlinsky]

Never try to erase the whole diskonchip by using docpmap /e .
After that there is a very good chance that you will not be able to 
work with this DOC again since, you erase a bad block table of the device .
If you want to return diskonchip back to its virgin state do the following :

1. docpmap /b /f:file_name 
  This operation saves bad block of the device in the file named file_name

2. docpmap /bc /f:file_name  
   This operation returns diskonchip to its virgin state, but does not
erases bad blocks .

3.  Now you can reformat diskonchip .

Vadim 

-----Original Message-----
From: schang@3inet.com [mailto:schang@3inet.com]
Sent: Wed, May 09, 2001 5:15 PM
To: Jason Walker; MTD Mailing List
Subject: Re: Oddities with MTD/DOC


If you have the M-System's DOS utility (downloadable), then try this:

docpmap /e

and see if it would wipe out the whole DOC and allows you to re-format again
using dformat (another DOS utility from M-System).  After that, try it in
Linux and see if it recognizes the DOC again.

Shuh Chang


----- Original Message -----
From: "Jason Walker" <jasonw@uswo.net>
To: "MTD Mailing List" <linux-mtd@lists.infradead.org>
Sent: Tuesday, May 08, 2001 6:38 PM
Subject: Oddities with MTD/DOC


> Just a question for you all: Have you ever had a DOC just *not* work
> anymore?  After formatting/installing my software on one for about 10-20
> times, the device refuses to be recognized by the kernel. I have a stack
of
> boxes that are in this state now.  Do I have to do some kind of low level
> format to them? I can't even fdisk them.  I would have a hard time
believing
> these are all just faulty.  Any insight on this?
>
> Jason Walker
> Network Engineer
> US Wireless Online
> www.uswo.net
>
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
>


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