用 sahara EDL mode 可以 dump 手机的 bootloader 与 system 吗？如何生成 Flash programmer 的 mbn 文件？

Qualcomm Snapdragon 425 (MSM8917)的杂牌手机 Sugar Y9，用 adb reboot edl 可以进 EDL 模式，lsusb 能看到：ID 05c6:9008 Qualcomm, Inc. Gobi Wireless Modem (QDL mode).

找到了emmcdl，抓到：

===============Device Class:sahara Protocol:firehose Emergency:false================
Sahara version 1--2
mode 3.

但没法生成 mbn 固件，网上的“ prog_emmc_firehose_8917_ddr_vo_y53.mbn ”也不行，传上去就丢失 USB 设备。

手机硬件如下：

* Alternative Names – Sugar Y9 4G Phablet
* Device Type – Android 4G Smartphone
* CPU – Quad-Core 1.4GHz Cortex-A53
* Chipset – Qualcomm Snapdragon 425
* GPU – Qualcomm Adreno 308
* Memory – RAM- 3GB | ROM 32GB External Memory Support Up to 128GB
* Display – Screen size 5.5 inches HD Display (1280 x 720 Pixels)

Filesystem               Size     Used     Free   Blksize
/                        1.4G     4.4M     1.4G   4096
/dev                     1.4G   120.0K     1.4G   4096
/sys/fs/cgroup           1.4G    20.0K     1.4G   4096
/mnt                     1.4G     0.0K     1.4G   4096
/system                  3.4G     2.3G     1.2G   4096
/data                   23.6G   933.4M    22.6G   4096
/cache                 412.6M     1.6M   411.0M   4096
/persist                27.5M   436.0K    27.1M   4096
/dsp                    11.7M     4.9M     6.8M   4096
/firmware               84.0M    70.3M    13.7M   16384
/storage                 1.4G     0.0K     1.4G   4096
/storage/emulated       23.1G   933.4M    22.2G   4096

这个手机是 eMMC 还是 UFS ？有办法根据“ RAM- 3GB | ROM 32GB ”来制作 mbn 吗？

具体分区信息如下：

cat /proc/partitions
major minor  #blocks  name

 179        0   30535680 mmcblk0
 179        1      86016 mmcblk0p1
 179        2          1 mmcblk0p2
 179        3          8 mmcblk0p3
 179        4        512 mmcblk0p4
 179        5        512 mmcblk0p5
 179        6        512 mmcblk0p6
 179        7        512 mmcblk0p7
 179        8       2048 mmcblk0p8
 179        9       2048 mmcblk0p9
 179       10        256 mmcblk0p10
 179       11        256 mmcblk0p11
 179       12      16384 mmcblk0p12
 179       13       1536 mmcblk0p13
 179       14       1536 mmcblk0p14
 179       15         32 mmcblk0p15
 179       16       1536 mmcblk0p16
 179       17         16 mmcblk0p17
 179       18      20480 mmcblk0p18
 179       19       1024 mmcblk0p19
 179       20       1024 mmcblk0p20
 179       21      65536 mmcblk0p21
 179       22      65536 mmcblk0p22
 179       23       1024 mmcblk0p23
 179       24    3760128 mmcblk0p24
 179       25     436224 mmcblk0p25
 179       26      32768 mmcblk0p26
 179       27       1024 mmcblk0p27
 179       28        512 mmcblk0p28
 179       29         32 mmcblk0p29
 179       30     262144 mmcblk0p30
 179       31         32 mmcblk0p31
 259        0        512 mmcblk0p32
 259        1       1024 mmcblk0p33
 259        2      32768 mmcblk0p34
 259        3        512 mmcblk0p35
 259        4       4096 mmcblk0p36
 259        5        256 mmcblk0p37
 259        6        256 mmcblk0p38
 259        7        256 mmcblk0p39
 259        8        256 mmcblk0p40
 259        9        256 mmcblk0p41
 259       10        256 mmcblk0p42
 259       11        256 mmcblk0p43
 259       12        256 mmcblk0p44
 259       13          8 mmcblk0p45
 259       14   25226727 mmcblk0p46
 179       32       4096 mmcblk0rpmb
 179       64   31166976 mmcblk1
 179       65   31165952 mmcblk1p1