I have two MS-DOS (FAT 16) 512MB Compact Flash cards (Cisco brand) and I can't seem to get my either of my two 2811 routers to read these cards in rommon.
I can read them on my PC and I have confirmed FAT 16 formatting. When I boot the router, rommon reports
open(): Open Error = -66
boot: cannot open "flash:"
boot: cannot determine first executible file name on device "flash:".
If I load an image from tftp using tftpdnld -r, it loads a 15.1 image successfully into memory and I have subsequently formatted the CF card (format flash: ) from IOS successfully. show flash: works fine. I have even copied another image over to the 512MB flash via my IOS session using tftp. IOS doesn't have any issues with the CF card. I can do a "show flash: all" and it reports multiple partitions. However, when reload the router, the boot stage dumps execution control into rommon indicating that it can't read the CF card ... error -66 again.
I have looked at Cisco's Using Compfact Flash Memory cards whitepaper and read some other posts where the poster indicated the CF card lost its partitions. However, in my case, i have reformatted using "format flash:" which should create a class C filesystem.
I have also seen various posts that indicate the 2811 can support up to 2GB flash sizes so this 512MB card should be fine.
Any ideas? this seems more complicated that it should be.
Thanks in advance...
well, thats a good question. they were purchased off eBay as authentic CF cards.
The reason why I ask this obvious question is because some else posted a similar issue with their so-called "Cisco" branded CF that was recently purchased from e-Bay. The thread was about two weeks old.
Well, the CF didn't work because they weren't really "Cisco" CF. So when he got another non-Cisco branded CF they worked.
I am suspecting you got your CF from the same seller.
My recommendation is go to your favorite electronics shop and get two different brand of 2Gb (or up to 4 Gb) CF and try both of them out.