Recovery of crashed DoC???

[Stephen Herzog]

Greetings,

Assuming the OS is not the data you really, really, need, you could try 
the following:  Remove the DoC and attach a regular IDE drive to the 
SBU 4825 and boot from IDE first. Next compile a kernel on it with 
DoC support. You will have to install your kernel on a floppy disk 
however to get it to boot rather than from DoC. Now put the DoC back
in the SBU, boot from floppy/linux-kernel try mounting the DoC. Perhaps
you can get some of the data that way. 

I don't think you want to use the DINFO.EXE utility.  That tool places
a dos bios patch on the nftl layer that allows the computer to boot 
from the DoC. 

Good luck,

Stephen Herzog

----- Original Message ----- 
From: "Colin Durey" <cabcam at optusnet.com.au>
To: "MTD List Admin (E-mail)" <linux-mtd at lists.infradead.org>
Sent: Tuesday, July 17, 2001 12:34 AM
Subject: Recovery of crashed DoC???


> I have a 40mb DoC which contains critical information that I really, really,
> need to get hold of.
> Linux fails to boot after discovering damaged blocks. The DoC is set as the
> boot device on an embedded SBU (Advantech 4825).
> 
> Plugging in a floppy and booting DOS, then using the DoC utility DINFO.EXE
> returns the following info:
> Drive Name:  C:
> Disk Size 40,072 kb
> Software Version 1.10
> TrueFFS Compatibility 3.3.2
> Firmware size 48kb
> 
> which suggest that the chip is still alive, at least.
> 
> Is there any way in which to read the data files from the DoC?  I have been
> told to use the utility DUPDATE.EXE to change the drive name to D: or
> something other than C:, so that I can then connect another HD and boot it
> as C: and then mount the DoC as a secondary drive and subsequently recover
> the precious files. DUPDATE.EXE doesn't seem to want to let me do that.
> 
> Anyone know what to do?
> 
> Colin Durey
> Cabcam - Tech Division
> +61-2-96984711 (T)  +61-2-96984674 (F)
> 
> 
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