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C1841-starting with rommon prompt, boot:cannot open flash

Hi

My C1841 startting with rommon prompt

when i tried to boot using the following command rommon 2 >boot flash:

i got the following error messages:

boot:cannot open flash

boot:cannot determine first executable file name on device flash.

Thanks

VJ,

7 REPLIES
Hall of Fame Super Gold

Re: C1841-starting with rommon prompt, boot:cannot open flash

What do you get when you enter the command "dir flash:"?

Re: C1841-starting with rommon prompt, boot:cannot open flash

Hi leo,

rommon 18 >dir flash:

dir: cannot open device "flash:"

Thanks

VJ.

Hall of Fame Super Gold

Re: C1841-starting with rommon prompt, boot:cannot open flash

It's either

1.  the flash drive or the flash card is faulty;

2.  someone inserted the wrong CF; or

3.  someone deleted the CF

The quickest way is to eject the CF and insert it into a multi-card reader.  If you have a windows client, format the CF using FAT16.  Once format is complete copy the IOS from your client to the CF and re-insert the CF back to the router.

Otherwise, use this process:

How to Download a Software Image to a Cisco 2600 via TFTP Using the tftpdnld ROMMON Command

http://www.cisco.com/en/US/customer/products/hw/routers/ps259/products_tech_note09186a008015bf9e.shtml

Re: C1841-starting with rommon prompt, boot:cannot open flash

Thanks for the details leo.

i have a USB slot in my C1841,

is it possible to copy the bin files to usb and install via usb ?.

Thanks

Vijay.

Hall of Fame Super Gold

Re: C1841-starting with rommon prompt, boot:cannot open flash

is it possible to copy the bin files to usb and install via usb

Not possible unless you have bootstrap version 12.4(13r)T6 and later.

Re: C1841-starting with rommon prompt, boot:cannot open flash

Hi Leo,

i have checked the 64mb compact flash in the card reader

compact flash not reading, it seems compact flash is faulty,

Non cisco brand CF's will work in C1841 ?

please suggest some CF brands that works with C1841,

Thanks

Vijay,

Hall of Fame Super Gold

Re: C1841-starting with rommon prompt, boot:cannot open flash

Non cisco brand CF's will work in C1841 ?

1.  Maximum size is 2Gb.

2.  Not all brands/manufacturer supported.  Try one and if it works, buy it.

3.  If it works, format with FAT16 on a Windows client, drop the file into the CF and boot the CF.

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