05-11-2008 01:20 AM - edited 03-05-2019 10:53 PM
After downgrading my 3640 router IOS, I have a problem where the flash is not shown when I execute "show version" or "show flash".
Here's what I got when I execute "show flash:" -
#show flash:
^
% Invalid input detected at '^' marker.
Everytime when I reload the router, the message below appears during boot-up -
% Crashinfo may not be recovered at flash:crashinfo
% This file system device reports an error
In ROMMON mode, I can run the command below -
rommon 6 > dir flash:
get_man_dev: Unknown device - probably NOT formatted.
get_man_dev: Unknown device - probably NOT formatted.
File size Checksum File name
22893664 bytes (0x15d5460) 0x9df1 c3640-is-mz.123-11.T10.bin
rommon 7 >
Thanks in advance.
05-11-2008 03:00 PM
It seems that filesystem on flash is got currupted
Issue the following commands for recovery
rommon>format flash:
rommon>IP_ADDRESS=xxx.xxx.xxx.xxx
rommon>IP_SUBNET_MASK=xxx.xxx.xxx.xxx
rommon>DEFAULT_GATEWAY=xxx.xxx.xxx.xxx
rommon>TFTP_SERVER=xxx.xxx.xxx.xxx
rommon>TFTP_FILE=
rommon>tftpdnld
05-12-2008 03:32 AM
How do I get to the 'rommon>' mode?
Is it the same as pressing the Break key when the router is powering up? If I do this, I will get to the 'rommon #>' mode ('#' is a number). From here, when I type the command 'format', I get a response showing the command not found.
05-12-2008 04:36 AM
I have not tried in rommon mode, but whenever I used the 'flash:' word in normal mode, it always say 'invalid input detected..'.
It seems the router doesn't know the flash exists.
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