| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | Sahara protocol error: Code 3 | Firehose programmer mismatch | Find the correct .elf file for your exact SoC and storage type. | | Unable to read from COM port | Driver conflict or cable issue | Use USB 2.0 port, reinstall QDLoader drivers, disable modem drivers. | | Memory dump failed: Invalid address range | You requested memory beyond physical storage | Double-check partition table and total storage size. | | Checksum mismatch | USB corruption or unstable power | Use a powered USB hub and shorter cable. | | Device not in Sahara mode | Device exited EDL | Reboot into EDL again; some devices timeout after 10 seconds. |
QPST (Qualcomm Product Support Tools) with the Sahara protocol can be used to perform a memory dump from Qualcomm-based devices in EDL (Emergency Download) mode. The following is a concise, practical guide covering prerequisites, risks, and step-by-step instructions. qpst sahara memory dump
The Sahara protocol operates in several modes, with being the specific state used for memory extraction. Unlike standard operating modes, this state is triggered when the device encounters a kernel panic or a critical system error, often referred to as "Dump Mode". | Error Message | Likely Cause | Solution
Researchers dump the bootloader from RAM to analyze anti-rollback mechanisms, ABOOT flaws, or secure boot patches. | | Checksum mismatch | USB corruption or
: A device in crash mode may show a "Qualcomm Crashdump Mode" screen or appear as a Qualcomm HS-USB Diagnostics (9006) port in Windows Device Manager. Automatic Capture via QPST : Open the QPST Configuration Tool.