How to Clear the Data on eMMC

[marble_hong]

Hi,

Is it possible to clear all the data on eMMC?
We need to recover our SOMs back to shipment state.
If anyone knows how to do it, please let us know.

[JerryChang]

hello marble_hong,

please check the image flashing logs, it’ll erase the target in the beginning of flash process.

[marble_hong]

Hi JerryChang,

Thank you for your help. I upload a flash log.
flash_sh.log (71.5 KB)
Could you help point out which line does the erasing eMMC storage work?

[JerryChang]

here it is…

[  44.5504 ] Erasing spi: 0 ......... [Done]
[ 303.6801 ] Erasing sdmmc_user: 3 ......... [Done]

[marble_hong]

Hi JerryChang,

We are trying to use tegraflash command to do the erasing work.
By using the following command, we got the following “Boot Rom communication failed” error.
Could you help advise?

~/nvidia/nvidia_sdk/JetPack_4.6_Linux_JETSON_XAVIER_NX_TARGETS/Linux_for_Tegra/bootloader (master) $ sudo ./tegraflash.py --bl nvtboot_recovery_cpu.bin --sdram_config tegra186-mb1-bct-memcfg-p3636-0001-a01.cfg --odmdata 0x2090000 --applet mb1_recovery_prod.bin  --cmd "erase APP"  --cfg flash.xml --chip 0x18
Welcome to Tegra Flash
version 1.0.0
Type ? or help for help and q or quit to exit
Use ! to execute system commands
 
[   0.0096 ] Generating RCM messages
[   0.0121 ] tegrarcm_v2 --listrcm rcm_list.xml --chip 0x18 0 --download rcm mb1_recovery_prod.bin 0 0
[   0.0134 ] RCM 0 is saved as rcm_0.rcm
[   0.0139 ] RCM 1 is saved as rcm_1.rcm
[   0.0140 ] List of rcm files are saved in rcm_list.xml
[   0.0140 ] 
[   0.0140 ] Signing RCM messages
[   0.0166 ] tegrasign_v3.py --key None --list rcm_list.xml --pubkeyhash pub_key.key
[   0.0167 ] Assuming zero filled SBK key
[   0.0248 ] Copying signature to RCM mesages
[   0.0272 ] tegrarcm_v2 --chip 0x18 0 --updatesig rcm_list_signed.xml
[   0.0287 ] 
[   0.0287 ] Boot Rom communication
[   0.0309 ] tegrarcm_v2 --chip 0x18 0 --rcm rcm_list_signed.xml
[   0.0319 ] BR_CID: 0x88021911647076c21400000012038180
[   0.0343 ] Boot Rom communication failed
[   5.1338 ] 
Error: Return value 8
Command tegrarcm_v2 --chip 0x18 0 --rcm rcm_list_signed.xml

[JerryChang]

hello marble_hong,

this is device communication issue, during the flashing process, it will connect/disconnect the device for several times.
if you’re using VM, this usually USB port forward issue.
if you’re using a Laptop, please have the power-supply connected or you might test with other USB ports.

[marble_hong]

Hi JerryChang,

The following tegraflash command could be used to erase the APP partition.

sudo ./tegraflash.py --bl nvtboot_recovery_cpu_t194.bin  --chip 0x19 --applet mb1_t194_prod.bin --sdram_config tegra194-mb1-bct-memcfg-p3668-0001-a00.cfg,tegra194-memcfg-sw-override.cfg --device_confi    g tegra19x-mb1-bct-device-qspi-p3668.cfg --misc_cold_boot_config tegra194-mb1-bct-misc-l4t.cfg --misc_config tegra194-mb1-bct-misc-flash.cfg --pinmux_config tegra19x-mb1-pinmux-p3668-a01.cfg --gpioint    _config tegra194-mb1-bct-gpioint-p3668-0001-a00.cfg --pmic_config tegra194-mb1-bct-pmic-p3668-0001-a00.cfg --pmc_config tegra19x-mb1-padvoltage-p3668-a01.cfg --prod_config tegra19x-mb1-prod-p3668-0001    -a00.cfg --scr_config tegra194-mb1-bct-scr-cbb-mini-p3668.cfg --scr_cold_boot_config tegra194-mb1-bct-scr-cbb-mini-p3668.cfg --br_cmd_config tegra194-mb1-bct-reset-p3668-0001-a00.cfg --dev_params tegr    a194-br-bct-qspi.cfg --soft_fuses tegra194-mb1-soft-fuses-l4t.cfg  --cfg  flash.xml --bin "mb2_bootloader nvtboot_recovery_t194.bin; mts_preboot preboot_c10_prod_cr.bin; mts_mce mce_c10_prod_cr.bin; m    ts_proper mts_c10_prod_cr.bin; bpmp_fw bpmp_t194.bin; bpmp_fw_dtb tegra194-a02-bpmp-p3668-a00.dtb; spe_fw spe_t194.bin; tlk tos-trusty_t194.img; eks eks.img; bootloader_dtb tegra194-p3668-all-p3509-00    00.dtb"  --odmdata 0xB8190000  --cmd "erase APP"

You may close this thread. Thank you for your help.

[JerryChang]

thanks for confirmation, issue closed.