Recovering Flight Logs from a Bricked VOXL2

[lhermosillo]

Hi all,

I'm attempting to recover the last flight logs from a VOXL 2 that suffered a crash. The VOXL 2 appears to power on normally (LEDs light up, board shows no visible damage), but it will not allow me to connect via ADB, SSH, or fastboot.

When connected to a PC, the device shows up as: Qualcomm HS-USB QDLoader 9008, so EDL.

My goal:
I'm trying to recover flight logs from the onboard UFS storage before re-flashing the system image.

What I've tried:

• Installed Qualcomm USB drivers to recognize Qualcomm HS-USB QDLoader 9008 as COM5
• Installed QPST/QFIL 2.7.460 (digitally signed Qualcomm build)
• Tried accessing partitions via QFIL's Partition Manager using various prog_firehose_ddr.elf files
  Every attempt so far results in:

ERROR: function: sahara_rx_data: Unable to read packet header. Only read 0 bytes.
ERROR: function: sahara_main: Sahara protocol error
ERROR: function: main: Uploading Image using Sahara protocol failed
Download Fail: Sahara Fail: QsaharaServer Fail: Process fail

Hardware Information:

• Model: VOXL 2 (M0154)
• Software was likely VOXL2 SDK 1.40?
• I've accessed VOXL2 QDL Image 14.1a_1.7.8, VOXL2 QDL Image 14.1a_1.1.2, and M0054-2 Starling QDL Image 1.7.4, for their prog_firehose_ddr.elf files and none have worked.

Questions:
Before proceeding with ModalAI's QDL web-based flashing tool (which I understand will wipe the UFS storage), I'm trying to confirm:

• Is there a VOXL 2 M0154 specific QDL image that includes the correct prog_firehose_ddr.elf for data recovery?
• Can the modal-qdl CLI or GUI tools be used in a non-destructive way to read partitions, similar to QFIL's "Read Data" function?
• If not, is there any safe way to extract the partitions regarding flight logs before flashing the board back to factory state?

System Setup:

• Host: Windows 11 + Ubuntu (WSL2)
• Device Manager shows: Qualcomm HS-USB QDLoader 9008 (COM 5)
• When attaching the Bus ID from Windows to WSL, lsusb shows: Bus 001 Device 003: ID 05c6:9008 Qualcomm, Inc. Gobi Wireless Modem (QDL mode)

Any help or access to the proper prog_firehose_ddr.elf for M0154 would be greatly appreciated.
My main priority is preserving those flight logs to narrow down what went wrong during a simple arm test.

Images:
(This VOXL 2 was from a legacy flight deck)

(QFIL Tool attempts for data recovery)

[tom]

@lhermosillo Can you try following the process documented here? https://docs.modalai.com/voxl2-unbricking/#unbricking-your-voxl-2

[lhermosillo]

@tom

Hi,
I tried it, and got this result:

Flashing Flat Build...
{"message": "modal hello\n[MODALAI] test log\n\n[MODALAI] Executing usb_open\n[MODALAI] Completed usb_open\n[MODALAI] Executing sahara_run\n\n\nFlash flat build failed\n"}

[N. Chen]

@lhermosillo said in Recovering Flight Logs from a Bricked VOXL2:

odal hello\n[MODALAI] test log\n\n[MODALAI] Executing usb_open\n[MODALAI] Complete

If you use the tool, you'll lose your data, unlike what you wished for in the OP.
However, if you want to proceed with this issue, I'd unplug the usb from the host, and reboot the device. Once booted, I'd plug the device and check with lsusb that is there ID 05c6:9008 Qualcomm, Inc. Gobi Wireless Modem (QDL mode). Then do the webUI process (select image, then flash).