How to copy IOS image into Read-only flash in Router(boot) state

[zhanggd]

All

My 2501 router lost its IOS image, now when reload, it comes into Router(boot)# state. When I issue copy tftp flash command, it tell me Device is Read-Only.

Please tell me how to handle this issue? Many Thanks.

[Georg Pauwen]

Hello,

AFAIR, you need to set the configuration register to 0x2101, reboot the device, copy from TFTP to flash, and then set the configuration register to 0x2102:

config t

config-reg 0x2101

CTRL Z

wr mem

reload

-----------------------------------------------------

enable --> should return with: router(boot)#

copy tftp flash

-->Enter the necessary IP number of the tftp server}

-->Enter the name of the upgrade file

y

y

y

config t

config-reg 0x2102

CTRL Z

and reboot. Can you try this and see if it works for you ?

Regards,

GP

[zhanggd]

Hi

I tried with your ways:

I changed to 0x2101,then reload. But when I copy tftp flash again, the router still tells me

Router(boot)#copy tftp flash

ERR: Device in READ-ONLY state

So it does not work. Any comments? Thanks.

[sarbjeet-dhillon]

Hi

If the Flash shows Read Only even after going to boot mode, there may be an issue with the Flash. Power down the router and reseat the Flash Single In-line Memory Modules (SIMMs). If it still shows Read Only, the Flash may need to be replaced.

Let me know how you get along.

Thanks

Sarb

[yasirirfan]

Hi zhanfggd

You can always use Xmodem Console Download Procedure using Rommon

Follow this link for more details,

http://www.cisco.com/en/US/customer/products/hw/routers/ps259/products_tech_note09186a008015bfac.shtml

do let me know did this solved your problem and if possible send me more details about your router,