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public text v1 · immutable> xmodem -cy c5400-boot-mz.123-1a.bin
Do not start the sending program yet...
device does not contain a valid magic number
dir: cannot open device "bootflash:"
WARNING: All existing data in bootflash will be lost!
Invoke this application only for disaster recovery.
Do you wish to continue? y/n [n]: y
Ready to receive file c5400-boot-mz.123-1a.bin ...
Erasing flash at 0xb8000000