一通电这样：
The system has been interrupted, or encountered an error
during initializion of the flash filesystem. The following
commands will initialize the flash filesystem, and finish
loading the operating system software:
flash_init
boot
然后flash_init报错
switch: flash_init
Initializing Flash...
flashfs[0]: unable to allocate available block.
...done Initializing Flash.
想查看下是不是系统文件丢失，发现查看不了，帮忙看下是不是格式不对：
switch: dir flash:/
unable to stat flash://: invalid argument
switch: dir flash://
unable to stat flash:///: invalid argument
switch: copy xmodem:c3560-ipservicesk9-mz.122-53.SE1.bin
usage: copy [-b <buffer_size>] <src_file> <dst_file>
想导个系统文件进去，发现导不了：
switch: copy xmodem:c3560-ipservicesk9-mz.122-53.SE1.bin
usage: copy [-b <buffer_size>] <src_file> <dst_file>
