# PC bumerc@bumerc-HP-EliteDesk-800-G4-SFF:~/utils/aml-flash-tool/tools/linux-x86$ ./update bulkcmd "fastboot" AmlUsbBulkCmd[fastboot] [AmlUsbRom]Err:return len=0 < strLenBusy 11 [AmlUsbRom]Inf:bulkInReply ERR: AmlUsbBulkCmd failed! bumerc@bumerc-HP-EliteDesk-800-G4-SFF:~$ fastboot devices 1234567890 Android Fastboot bumerc@bumerc-HP-EliteDesk-800-G4-SFF:~$ fastboot flashing unlock OKAY [ 0.025s] Finished. Total time: 0.025s bumerc@bumerc-HP-EliteDesk-800-G4-SFF:~$ fastboot flash boot ~/los-22.1/out/target/product/gt1mini/boot.img Sending 'boot' (16384 KB) OKAY [ 2.880s] Writing 'boot' OKAY [ 0.606s] Finished. Total time: 3.617s # uart BULKcmd[fastboot] g_dnl_register: g_dnl_driver.name = usb_dnl_fastboot USB RESET SPEED ENUM USB RESET SPEED ENUM lock state: 10101000 cb_flashing: unlock avb2: 0 lock_d state: 10100000 ## defenv_reserve Saving Environment to aml-storage... mmc env offset: 0x39400000 Writing to MMC(1)... done response: OKAY Start read misc partition datas! active slot = 0 cb_getvar: has-slot:boot U_BOOT_DATE_TIME: 250216.210647 s_version: 01.01.250216.210647 Start read misc partition datas! active slot = 0 cb_getvar: max-download-size U_BOOT_DATE_TIME: 250216.210647 s_version: 01.01.250216.210647 Start read misc partition datas! active slot = 0 cb_getvar: is-logical:boot U_BOOT_DATE_TIME: 250216.210647 s_version: 01.01.250216.210647 partition is boot Logical partition metadata has invalid geometry magic signature Logical partition metadata has invalid geometry magic signature readMetadata - readMetadata Usage: readMetadata This command will read metadata in super So you can execute command: readMetadata Start read misc partition datas! active slot = 0 cb_getvar: is-logical:boot U_BOOT_DATE_TIME: 250216.210647 s_version: 01.01.250216.210647 partition is boot Logical partition metadata has invalid geometry magic signature Logical partition metadata has invalid geometry magic signature readMetadata - readMetadata Usage: readMetadata This command will read metadata in super So you can execute command: readMetadata Start read misc partition datas! active slot = 0 cb_getvar: partition-size:boot U_BOOT_DATE_TIME: 250216.210647 s_version: 01.01.250216.210647 partition is boot size:0000000001000000 cmd cb_download is download:01000000 lock state: 10100000 Starting download of 16777216 bytes .......................................................................... ...................................................... downloading of 16777216 bytes finished cmd cb_flash is flash:boot lock state: 10100000 Logical partition metadata has invalid geometry magic signature Logical partition metadata has invalid geometry magic signature readMetadata - readMetadata Usage: readMetadata This command will read metadata in super So you can execute command: readMetadata partition is boot Flashing Raw Image ........ wrote 16777216 bytes to 'boot'