〖Android〗/system/etc/recovery-resource.dat

源代碼中的解釋：[platform_build/tools/releasetools/ota_from_target_files]

    # Recovery is generated as a patch using both the boot image
    # (which contains the same linux kernel as recovery) and the file
    # /system/etc/recovery-resource.dat (which contains all the images
    # used in the recovery UI) as sources.  This lets us minimize the
    # size of the patch, which must be included in every OTA package.
    #
    # For older builds where recovery-resource.dat is not present, we
    # use only the boot image as the source.

這個文件比recovery.img明顯要小，從這一段描述中可以看出，這里只是裝載了recovery的資源，而沒有kernel。