I'm upgrading a 1750 access router from 4Mb Flash to 8Mb. I'm aware that there is no image loaded on the flash card, however, when using xmodem or tftp the flash refuses to accept the image I'm uploading. I've tried it on two different routers just in case the router was the cause of the problem and still no joy. Then I went one step further and swapped the flash keeping the same brand (the make is SMART and the number on it SM9F208IM3) and the image upload still doesn't work. It seems highly unlikely but could it possibly be a bad batch?
Error message is identical to another message posted elsewhere on this forum:
device does not contain a valid magic number
boot: cannot open flash
boot: cannot determine file name on device "flash:"
It then goes into ROMMON mode
I later managed to source some 8Mb SHARP flash as well with my desired image (c1700-sv3y-mz.121-3b.bin) already on it and the router loads perfectly.
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