cisco3640路由器的ios被删如何恢复？

shljs#copy tftp flash Address or name of remote host []? 192.168.0.203 Source filename []? c3640-is-mz_120-7_t.bin Destination filename [c3640-is-mz_120-7_t.bin]? Accessing tftp://192.168.0.203/c3640-is-mz_120-7_t.bin... Loading c3640-is-mz_120-7_t.bin from 192.168.0.203 (via FastEthernet1/0): !!!! Erase flash: before copying? [confirm] Erasing the flash filesystem will remove all files! Continue? [confirm] Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erased Erase of flash: complete Loading c3640-is-mz_120-7_t.bin from 192.168.0.203 (via FastEthernet1/0): ! %Error copying tftp://192.168.0.203/c3640-is-mz_120-7_t.bin (Not enough space on device)