[c-nsp] 3640 Flash Upgrade

[Bryan King]

I used to have this problem with new (3rd party) flash for 2600's where
the flash was not formatted correctly from the manufacturer. Have you
tried to using XMODEM to load your new image straight to DRAM and bypass
the flash? Once you have the router running you can format the flash
correctly and tftp your image to it.

Of course one alternative is to use a flash disk instead of the onboard
flash. They are cheap and plentiful.

 
InLine>
bryan king | Senior Network Engineer
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205-941-1934[f]
bking at inline.com
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From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jonathan Charles
Sent: Monday, February 25, 2008 12:18 AM
To: Travis Dangel
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] 3640 Flash Upgrade

This is just a stab int he dark, but could it be that you need new PROMs
to get the router to see em? I know this was an issue on 2600s...



Jonathan

On Sun, Feb 24, 2008 at 11:24 PM, Travis <td at travisdangel.com> wrote:
> I purchased 2 new flash SIMMs to upgrade a 3640 from 8MB to 32MB and 
> I'm  having trouble getting them to work. I'm to the point now where 
> I'm thinking  they are just for the wrong platform but I'm seeking 
> advice before I attempt  to have them exchanged in case I'm missing
something.
>
>
>
>  When the router boots with the new flash SIMMs in I get the following
>  errors:
>
>
>
>  unknown flash device - mandev code = 0xffff
>
>  cannot read flash info
>
>  getdevnum warning: device "flash" has size of zero
>
>  unknown flash device - mandev code = 0xffff
>
>  cannot read flash info
>
>  getdevnum warning: device "flash" has size of zero
>
>  open: read error...requested 0x4 bytes, got 0x0
>
>  trouble reading device magic number
>
>  boot: cannot open "flash:"
>
>
>
>  and then it dumps me to rommon. When I try to copy an image over via 
> Xmodem  it responds with insufficient space for the ios image after it

> tries to  erase the flash and won't even let me start the transfer.
>
>
>
>  The odd thing is I can put in ONE 16MB SIMM in the second flash 
> socket and  leave the original 8MB SIMM in the first socket and the 
> router boots just  fine and shows 24MB of flash memory. If I replace 
> that 8MB and use BOTH 16MB  SIMMs then it dumps the above error. Same 
> result if I try just one of 16MB  in the first socket alone - dumps
errors and shows 0 bytes on the flash.
>
>
>
>  I read some very dated solution to a similar problem where a somebody

> had  done some partitioning to make it work but I can't seem to get 
> that to work  either. however, I've never played with flash 
> partitioning in IOS either so  I could be doing something wrong. I 
> booted with the 8MB in the first slot  and the new 16MB in the second 
> slot. I then created 2 new partitions, one  that was 8MB and one that 
> was 16MB and then copied the boot files to the  16MB partition so the 
> 8 and 16 were equal, however, it did not work. I got  the same errors
upon boot when I tried the 16MB all by itself again.
>
>
>
>  Any help or advice would be appreciated. Thanks in advance!
>
>
>
>
>
>  Travis
>
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