D:\360极速浏览器下载\moto_fastboots\Windows>fastboot flash system system.img
(bootloader) Variable not supported!
target reported max download size of 805306368 bytes
Invalid sparse file format at header magi
D:\360极速浏览器下载\moto_fastboots\Windows>fastboot flash system system.img
(bootloader) Variable not supported!
target reported max download size of 805306368 bytes
Invalid sparse file format at header magi
D:\360极速浏览器下载\moto_fastboots\Windows>fastboot flash system system.img
(bootloader) Variable not supported!
target reported max download size of 805306368 bytes
Invalid sparse file format at header magi