[c-nsp] 7206 NVRAM issue

[Tom Storey]

Seems I am wrong. :-)

http://www.cisco.com/en/US/docs/routers/7200/install_and_upgrade/7200_i.o_controller_install/4447io.html#wp174391

5 The NVRAM on some I/O controllers is replaced by a 32-pin nonsocketed
SRAM component that is soldered onto the card. The SRAM component is made
to act like the NVRAM by the addition of some external components, one of
which is a 1-inch (2.54-cm) button-type lithium battery.

Though I suppose the key words are "made to act like". :-P


On 28 December 2012 09:30, Tom Storey <tom at snnap.net> wrote:

> Correct me if I am wrong, but NVRAM is non-volatile RAM, i.e. it doesnt
> need power to retain its contents.
>
> If that is failing, I would suspect something worse than a dud battery.
>
>
> On 27 December 2012 11:52, Wilkinson, Alex <alex.wilkinson at cba.com.au>wrote:
>
>>     0n Thu, Dec 27, 2012 at 09:09:48AM +1100, Joseph Mays wrote:
>>
>>     >Got a used 7206 I am trying to bring back to life. It seems to be
>> able to
>>     >read the PCMCIA card in the slot okay, but after a power cycle it
>> loses
>>     >config and claims the NVRAM is corrupt, throwing me to rommon. From
>> there I
>>     >can tell it to boot from disk0 and it boots alright from the PCMCIA
>> card
>>     >into the default config. Needless to say, any config I have entered
>> gets
>>     >lost. Which NVRAM is it referring to? The 4 meg on the motherboard?
>> Is
>>     >there anyway to clear and reset that, or does it just need to be
>> replaced?
>>     >
>>     >Warning: monitor nvram area is corrupt ... using default values C7200
>>     >platform with 131072 Kbytes of main memory
>>     >
>>     >[after a power cycle....]
>>     >
>>     >System Bootstrap, Version 12.2(4r)B, RELEASE SOFTWARE (fc1) TAC
>> Support:
>>     >http://www.cisco.com/tac Copyright (c) 2002 by cisco Systems, Inc.
>>     >
>>     >Warning: monitor nvram area is corrupt ... using default values C7200
>>     >platform with 131072 Kbytes of main memory
>>     >
>>     >rommon 1 > boot disk0
>>
>>
>> I have seen a very similar hardware bug on 65K-SUP720s:
>> http://www.cisco.com/en/US/ts/fn/200/fn27595.html
>>
>>    -Alex
>>
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