Merge branch 'pr-35/kobol-io/update'

docs/helios64/i2c.md

@@ -35,7 +35,7 @@ Bus 2:
 Slave   | Address  | Description|
 ------- | ------   |------      |
 NCT75   | 0x4c     |            |
-PCA9655 | 0x21     |            |
+PCA9655 | 0x20     |            |
 
 Bus 4:
 

docs/helios64/install/transfer.md

@@ -0,0 +1,448 @@
+Armbian provides a utility called *nand-sata-install* to transfer OS from SD card to other device such as USB, SATA, or NVMe.
+The utility can be invoke directly,
+
+```
+sudo nand-sata-install
+```
+
+or the recommended way, through *armbian-config*
+
+```
+sudo armbian-config
+```
+
+Helios64 support following boot mode
+
+| Boot Device | System / Rootfs Device |
+|-------------|------------------------|
+| eMMC | eMMC<br>SATA Drive<br>USB Drive|
+
+Boot device contains bootloader and other boot files such as kernel and DTB. It will be mounted under **/boot/** if it resides on separate device.
+
+!!! Notes
+    *nand-sata-install* requires the target device to be already partitioned!
+
+!!! Important
+    If you have installed and configured OMV, please read [Existing OS Has OMV Installed](#existing-os-has-omv-installed) section before transferring the OS.
+
+## System on eMMC
+
+***Step 1 - Run Armbian Configuration Utility***
+
+![emmc step 0](/helios64/install/img/transfer/emmc_00_config_main.png)
+
+***Step 2 - Select Install Menu***
+
+![emmc step 1](/helios64/install/img/transfer/emmc_01_config_system.png)
+
+***Step 3 - Select Boot from eMMC - system on eMMC***
+
+![emmc step 2](/helios64/install/img/transfer/emmc_02_install_main.png)
+
+***Step 4 - Confirm that the process will erase data on eMMC***
+
+![emmc step 3](/helios64/install/img/transfer/emmc_03_install_erase_confirm.png)
+
+***Step 5 - Select filesystem type for eMMC***
+
+![emmc step 4](/helios64/install/img/transfer/emmc_04_install_fstype.png)
+
+***Step 6 - Wait for transfer process to complete***
+
+![emmc step 5](/helios64/install/img/transfer/emmc_05_install_transfer.png)
+
+***Step 7 - Power Off Helios64 if you don't have OMV Installed***
+
+**DO NOT** power off if you have installed OMV. There are several OMV files & folders not transferred by *nand-sata-install*. Please refer to [After running *nand-sata-install*](#existing-os-has-omv-installed) section before continue to next step.
+
+![emmc step 6](/helios64/install/img/transfer/emmc_06_install_poweroff.png)
+
+***Step 8 - Remove Micro SD card and power on the system***
+
+***Step 9 - Verify if the system transferred correctly***
+
+```
+lsblk
+
+NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
+sda            8:0    0 111.8G  0 disk
+└─sda1         8:1    0 111.8G  0 part
+sdb            8:16   0 111.8G  0 disk
+└─sdb1         8:17   0 111.8G  0 part
+sdc            8:32   1  28.7G  0 disk
+└─sdc1         8:33   1  28.4G  0 part
+mmcblk1      179:0    0  14.6G  0 disk
+└─mmcblk1p1  179:1    0  14.4G  0 part /
+mmcblk1boot0 179:32   0     4M  1 disk
+mmcblk1boot1 179:64   0     4M  1 disk
+zram0        251:0    0    50M  0 disk /var/log
+zram1        251:1    0   1.9G  0 disk [SWAP]
+```
+
+You should see **mmcblk1p1** has MOUNTPOINT **/**
+
+## System on USB or SATA (Including M.2 SATA)
+
+List available block devices and determine the type by running
+
+```
+lsblk
+ls -l /sys/block/
+```
+
+Example output:
+
+```
+dev@helios64:~# lsblk
+NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
+sda            8:0    0 111.8G  0 disk
+└─sda1         8:1    0 111.8G  0 part
+sdb            8:16   0 111.8G  0 disk
+└─sdb1         8:17   0 111.8G  0 part
+sdc            8:32   1  28.7G  0 disk
+└─sdc1         8:33   1  28.4G  0 part
+mmcblk0      179:0    0  14.9G  0 disk
+└─mmcblk0p1  179:1    0  14.7G  0 part /
+mmcblk1      179:32   0  14.6G  0 disk
+└─mmcblk1p1  179:33   0  14.4G  0 part
+mmcblk1boot0 179:64   0     4M  1 disk
+mmcblk1boot1 179:96   0     4M  1 disk
+zram0        251:0    0    50M  0 disk /var/log
+zram1        251:1    0   1.9G  0 disk [SWAP]
+
+dev@helios64:~# ls -l /sys/block/
+total 0
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 loop0 -> ../devices/virtual/block/loop0
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 loop1 -> ../devices/virtual/block/loop1
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 loop2 -> ../devices/virtual/block/loop2
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 loop3 -> ../devices/virtual/block/loop3
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 loop4 -> ../devices/virtual/block/loop4
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 loop5 -> ../devices/virtual/block/loop5
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 loop6 -> ../devices/virtual/block/loop6
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 loop7 -> ../devices/virtual/block/loop7
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 mmcblk0 -> ../devices/platform/fe320000.mmc/mmc_host/mmc0/mmc0:aaaa/block/mmcblk0
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 mmcblk1 -> ../devices/platform/fe330000.sdhci/mmc_host/mmc1/mmc1:0001/block/mmcblk1
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 mmcblk1boot0 -> ../devices/platform/fe330000.sdhci/mmc_host/mmc1/mmc1:0001/block/mmcblk1/mmcblk1boot0
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 mmcblk1boot1 -> ../devices/platform/fe330000.sdhci/mmc_host/mmc1/mmc1:0001/block/mmcblk1/mmcblk1boot1
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 sda -> ../devices/platform/f8000000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/ata1/host0/target0:0:0/0:0:0:0/block/sda
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 sdb -> ../devices/platform/f8000000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/ata4/host3/target3:0:0/3:0:0:0/block/sdb
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 sdc -> ../devices/platform/usb@fe900000/fe900000.usb/xhci-hcd.0.auto/usb2/2-1/2-1.3/2-1.3:1.0/host5/target5:0:0/5:0:0:0/block/sdc
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 zram0 -> ../devices/virtual/block/zram0
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 zram1 -> ../devices/virtual/block/zram1
+lrwxrwxrwx 1 root root 0 Nov  5 10:13 zram2 -> ../devices/virtual/block/zram2
+```
+
+From output above, the types are:
+
+| Block Device | Physical drive | Remarks |
+|--------------|----------------|---------|
+| **mmcblk0** | micro SD card | |
+| **mmcblk1** | eMMC | |
+| **sda** | SATA or M.2 drive connected to Port 1 | *../devices/platform/f8000000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/***ata1***/* |
+| **sdb** | SATA drive connected to Port 4 | *../devices/platform/f8000000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/***ata4***/* |
+| **sdc** | USB drive connected to USB Port 3 (Front Panel) | *../devices/platform/usb@fe900000/fe900000.usb/xhci-hcd.0.auto/usb2/2-1/2-1***.3***/* |
+
+
+***Step 1 - Run Armbian Configuration Utility***
+
+```
+sudo armbian-config
+```
+
+![sata step 0](/helios64/install/img/transfer/sata_usb_00_config_main.png)
+
+***Step 2 - Select Install Menu***
+
+![sata step 1](/helios64/install/img/transfer/sata_usb_01_config_system.png)
+
+***Step 3 - Select Boot from eMMC - system on SATA, USB or NVMe***
+
+![sata step 2](/helios64/install/img/transfer/sata_usb_02_install_main.png)
+
+**Step 4 - Select storage device and partition for rootfs***
+
+  *SATA drive at port 1 as System drive*
+
+  ![sata step 3a](/helios64/install/img/transfer/sata_usb_03_select_target_sata.png)
+
+---
+
+  *USB drive as System drive*
+
+  ![sata step 3b](/helios64/install/img/transfer/sata_usb_03_select_target_usb.png)
+
+
+***Step 5 - Confirm that the process will erase data on eMMC and system partition***
+
+![sata step 4](/helios64/install/img/transfer/sata_usb_04_install_erase_confirm.png)
+
+***Step 6 - Select filesystem type for eMMC***
+
+![sata step 5](/helios64/install/img/transfer/sata_usb_05_install_boot_fstype.png)
+
+Wait until formatting process completed
+
+![sata step 6](/helios64/install/img/transfer/sata_usb_06_install_format_boot.png)
+
+***Step 7 - Select filesystem type for system partition***
+
+![sata step 7](/helios64/install/img/transfer/sata_usb_07_install_system_fstype.png)
+
+Wait until formatting process is completed
+
+![sata step 8](/helios64/install/img/transfer/sata_usb_08_install_format_system.png)
+
+***Step 8 - Wait for transfer process to be completed***
+
+![sata step 9](/helios64/install/img/transfer/sata_usb_09_install_transfer.png)
+
+***Step 9 - Power Off Helios64 if you don't have OMV Installed***
+
+**DO NOT** power off if you have installed OMV. There are several OMV files & folders not transferred by *nand-sata-install*. Please refer to [After running *nand-sata-install*](#existing-os-has-omv-installed) section before continue to next step.
+
+![sata step 10](/helios64/install/img/transfer/sata_usb_10_install_poweroff.png)
+
+***Step 10 - Remove Micro SD card and power on the system***
+
+***Step 11 - Verify if the system transferred correctly***
+
+*System on SATA or M.2*
+
+```
+lsblk
+
+NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
+sda            8:0    0 111.8G  0 disk
+└─sda1         8:1    0 111.8G  0 part /
+sdb            8:16   0 111.8G  0 disk
+└─sdb1         8:17   0 111.8G  0 part
+sdc            8:32   1  28.7G  0 disk
+└─sdc1         8:33   1  28.4G  0 part
+mmcblk1      179:0    0  14.6G  0 disk
+└─mmcblk1p1  179:1    0  14.4G  0 part /media/mmcboot
+mmcblk1boot0 179:32   0     4M  1 disk
+mmcblk1boot1 179:64   0     4M  1 disk
+zram0        251:0    0    50M  0 disk /var/log
+zram1        251:1    0   1.9G  0 disk [SWAP]
+```
+
+You should see SATA drive at Port 1 has MOUNTPOINT **/** and eMMC has MOUNTPOINT **/media/mmcboot**
+
+---
+
+*System on USB*
+
+```
+lsblk
+
+NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
+sda            8:0    0 111.8G  0 disk
+└─sda1         8:1    0 111.8G  0 part
+sdb            8:16   0 111.8G  0 disk
+└─sdb1         8:17   0 111.8G  0 part
+sdc            8:32   1  28.7G  0 disk
+└─sdc1         8:33   1  28.4G  0 part /
+mmcblk1      179:0    0  14.6G  0 disk
+└─mmcblk1p1  179:1    0  14.4G  0 part /media/mmcboot
+mmcblk1boot0 179:32   0     4M  1 disk
+mmcblk1boot1 179:64   0     4M  1 disk
+zram0        251:0    0    50M  0 disk /var/log
+zram1        251:1    0   1.9G  0 disk [SWAP]
+```
+
+You should see USB drive has MOUNTPOINT **/** and eMMC has MOUNTPOINT **/media/mmcboot**
+
+
+## Transfer rootfs from eMMC to SATA or USB
+
+List available block devices and determine the type by running
+
+```
+lsblk
+ls -l /sys/block/
+```
+
+Example output:
+
+```
+dev@helios64:~$ lsblk
+NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
+sda            8:0    0 111.8G  0 disk
+└─sda1         8:1    0 111.8G  0 part
+sdb            8:16   0 111.8G  0 disk
+└─sdb1         8:17   0 111.8G  0 part
+sdc            8:32   1  28.7G  0 disk
+└─sdc1         8:33   1  28.4G  0 part
+mmcblk1      179:0    0  14.6G  0 disk
+└─mmcblk1p1  179:1    0  14.4G  0 part /
+mmcblk1boot0 179:32   0     4M  1 disk
+mmcblk1boot1 179:64   0     4M  1 disk
+
+dev@helios64:~$ ls -l /sys/block
+total 0
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 loop0 -> ../devices/virtual/block/loop0
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 loop1 -> ../devices/virtual/block/loop1
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 loop2 -> ../devices/virtual/block/loop2
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 loop3 -> ../devices/virtual/block/loop3
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 loop4 -> ../devices/virtual/block/loop4
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 loop5 -> ../devices/virtual/block/loop5
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 loop6 -> ../devices/virtual/block/loop6
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 loop7 -> ../devices/virtual/block/loop7
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 mmcblk1 -> ../devices/platform/fe330000.sdhci/mmc_host/mmc1/mmc1:0001/block/mmcblk1
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 mmcblk1boot0 -> ../devices/platform/fe330000.sdhci/mmc_host/mmc1/mmc1:0001/block/mmcblk1/mmcblk1boot0
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 mmcblk1boot1 -> ../devices/platform/fe330000.sdhci/mmc_host/mmc1/mmc1:0001/block/mmcblk1/mmcblk1boot1
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 sda -> ../devices/platform/f8000000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/ata1/host0/target0:0:0/0:0:0:0/block/sda
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 sdb -> ../devices/platform/f8000000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/ata4/host3/target3:0:0/3:0:0:0/block/sdb
+lrwxrwxrwx 1 root root 0 Nov 11 04:19 sdc -> ../devices/platform/usb@fe900000/fe900000.usb/xhci-hcd.0.auto/usb2/2-1/2-1.3/2-1.3:1.0/host5/target5:0:0/5:0:0:0/block/sdc
+```
+
+From output above, the types are:
+
+| Block Device | Physical drive | Remarks |
+|--------------|----------------|---------|
+| **mmcblk1** | eMMC | |
+| **sda** | SATA or M.2 drive connected to Port 1 | *../devices/platform/f8000000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/***ata1***/* |
+| **sdb** | SATA drive connected to Port 4 | *../devices/platform/f8000000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/***ata4***/* |
+| **sdc** | USB drive connected to USB Port 3 (Front Panel) | *../devices/platform/usb@fe900000/fe900000.usb/xhci-hcd.0.auto/usb2/2-1/2-1***.3***/* |
+
+***Step 1 - Run Armbian Configuration Utility***
+
+```
+sudo armbian-config
+```
+
+![emmc step 0](/helios64/install/img/transfer/emmc_sata_00_config_main.png)
+
+***Step 2 - Select Install Menu***
+
+![emmc step 1](/helios64/install/img/transfer/emmc_sata_01_config_system.png)
+
+***Step 3 - Select Boot from SD - system on SATA, USB or NVMe***
+
+!!! Info
+    The utility has flaw that it mistakenly read current boot device as SD card instead of eMMC. But it actually set the eMMC as boot device and system on SATA or USB device.
+
+![emmc step 2](/helios64/install/img/transfer/emmc_sata_02_install_menu.png)
+
+***Step 4 - Select storage device and partition for rootfs***
+
+  *SATA drive at port 1 as System drive*
+
+  ![emmc step 3a](/helios64/install/img/transfer/emmc_sata_03_install_select_target_sata.png)
+
+---
+
+  *USB drive as System drive*
+
+  ![emmc step 3b](/helios64/install/img/transfer/emmc_sata_03_install_select_target_usb.png)
+
+***Step 5 - Confirm that the process will erase data on eMMC and system partition***
+
+![emmc step 4](/helios64/install/img/transfer/emmc_sata_04_install_erase_confirmation.png)
+
+***Step 6 - Select filesystem type for eMMC***
+
+![emmc step 5](/helios64/install/img/transfer/emmc_sata_05_install_fstype.png)
+
+Wait until formatting process is completed
+
+![emmc step 6](/helios64/install/img/transfer/emmc_sata_06_install_format.png)
+
+***Step 7 - Wait for transfer process to be completed***
+
+![emmc step 9](/helios64/install/img/transfer/emmc_sata_07_install_transfer.png)
+
+***Step 8 - Reboot Helios64 if you don't have OMV Installed***
+
+**DO NOT** reboot if you have installed OMV. There are several OMV files & folders not transferred by *nand-sata-install*. Please refer to [After running *nand-sata-install*](#existing-os-has-omv-installed) section before continue to next step.
+
+![emmc step 10](/helios64/install/img/transfer/emmc_sata_08_install_reboot.png)
+
+***Step 9 - Power on the system***
+
+***Step 10 - Verify if the system transferred correctly***
+
+*System on SATA or M.2*
+
+```
+lsblk
+
+NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
+sda            8:0    0 111.8G  0 disk
+└─sda1         8:1    0 111.8G  0 part /
+sdb            8:16   0 111.8G  0 disk
+└─sdb1         8:17   0 111.8G  0 part
+sdc            8:32   1  28.7G  0 disk
+└─sdc1         8:33   1  28.4G  0 part
+mmcblk1      179:0    0  14.6G  0 disk
+└─mmcblk1p1  179:1    0  14.4G  0 part /media/mmcboot
+mmcblk1boot0 179:32   0     4M  1 disk
+mmcblk1boot1 179:64   0     4M  1 disk
+zram0        251:0    0    50M  0 disk /var/log
+zram1        251:1    0   1.9G  0 disk [SWAP]
+```
+
+You should see SATA drive at Port 1 has MOUNTPOINT **/** and eMMC has MOUNTPOINT **/media/mmcboot**
+
+---
+
+*System on USB*
+
+```
+lsblk
+
+NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
+sda            8:0    0 111.8G  0 disk
+└─sda1         8:1    0 111.8G  0 part
+sdb            8:16   0 111.8G  0 disk
+└─sdb1         8:17   0 111.8G  0 part
+sdc            8:32   1  28.7G  0 disk
+└─sdc1         8:33   1  28.4G  0 part /
+mmcblk1      179:0    0  14.6G  0 disk
+└─mmcblk1p1  179:1    0  14.4G  0 part /media/mmcboot
+mmcblk1boot0 179:32   0     4M  1 disk
+mmcblk1boot1 179:64   0     4M  1 disk
+zram0        251:0    0    50M  0 disk /var/log
+zram1        251:1    0   1.9G  0 disk [SWAP]
+```
+
+You should see USB drive has MOUNTPOINT **/** and eMMC has MOUNTPOINT **/media/mmcboot**
+
+## Existing OS Has OMV Installed
+
+Transferring rootfs using *nand-sata-install* will break OMV due to missing files. To prevent this, you need to perform the following actions.
+
+### Preparation before running *nand-sata-install*
+
+If you have configured NFS share located on SATA drive(s), you might like to prevent the content to be copied over to eMMC. run following command to prevent it
+
+```
+echo "/export/*" | sudo tee -a /usr/lib/nand-sata-install/exclude.txt
+```
+
+Lastly, if you're using ZFS, which by default mounts to **/<pool_name>**, make sure to add its mountpoint to **/usr/lib/nand-sata-install/exclude.txt** before running *nand-sata-install* as well.
+
+### After running *nand-sata-install*
+
+OMV 5 stores part of its config (**salt** and **pillar** folders) in **/srv/** which are excluded by *nand-sata-install*.
+
+Before power off the system to finalize the system transfer, we need to mount system partition and copy those folders into it and finally power off the system.
+
+```
+sudo mkdir -p /mnt/system
+sudo mount /dev/sda1 /mnt/system
+sudo cp -rf -t /mnt/system/srv/ /srv/salt /srv/pillar
+sudo poweroff
+```
+
+!!! Note
+    Pay attention to block device of system partition at second command. In this case /dev/sda1 is SATA drive at Port 1.
+
+Now you can resume back to the steps your were following.
+
+
+## References
+
+- [Armbian Documentation](https://docs.armbian.com/User-Guide_Getting-Started/#how-to-install-to-emmc-nand-sata-usb)
+
+- [Tips from antsu at Armbian Forum](https://forum.armbian.com/topic/15431-helios64-support/?do=findComment&comment=110715)

docs/helios64/troubleshoot.md

@@ -0,0 +1,126 @@
+
+## Problem: Could not connect to Helios64
+
+### Faulty Power Supply
+
+Verify whether [LED1](/helios64/led/) is turned on. If not tighten DC cable from PSU.
+
+Verify whether LED on the PSU is turned on. If not tighten AC cable from PSU
+
+If problem still occurs, replace the PSU.
+
+### OS Failure
+
+Verify whether [System Activity LED](/helios64/front-panel/#helios64-enclosure) is blinking. If it is not, reset or power cycle.
+
+If problem still occurs, please capture the serial console output and report it to [forum](https://forum.armbian.com/forum/51-helios64/).
+
+### Kernel Panic
+
+If [System Error LED](/helios64/front-panel/#helios64-enclosure) blinking, there was kernel panic. Please reset the system.
+
+If problem still occurs, please capture the serial console output and report it to [forum](https://forum.armbian.com/forum/51-helios64/).
+
+### Network down
+
+Verify whether Ethernet LED turned on. If it is not, try to unplug and re-plug the network cable.
+
+If network still down, try other Ethernet port.
+
+### Corrupted filesystem
+
+Boot from micro SD card and execute following command to repair system partition on eMMC
+
+```
+fsck -p /dev/mmcblk1p1
+```
+or
+```
+btrfs check --repair /dev/mmcblk1p1
+```
+if your system partition formatted with BTRFS.
+
+### Micro SD card slot broken
+
+Try to flash OS directly to eMMC using [maskrom mode](/helios64/maskrom/)
+
+### Old bootloader
+
+On October 5th, 2020 there was device tree (dtb) filename change. It applied to Armbian 20.08.8.
+Originally the filename is **rk3399-helios64.dtb** and changed into **rk3399-kobol-helios64.dtb**
+
+Boot from micro SD card and execute following commands
+
+```
+sudo mkdir -p /mnt/system
+sudo mount /dev/mmcblk1p1 /mnt/system
+sudo ln -sf rk3399-kobol-helios64.dtb /mnt/system/boot/dtb/rockchip/rk3399-helios64.dtb
+sudo umount /mnt/system
+sudo poweroff
+```
+
+Remove the micro SD card and power on the system.
+
+After boot successfully to eMMC, we strongly suggest to update the bootloader using armbian-config.
+
+### Rootfs is not accessible
+
+If you have transfer the rootfs to SATA or USB, make sure the device is still accessible and you don't remove the device.
+
+Boot from micro SD card and execute following command,
+
+```
+sudo mkdir -p /mnt/system
+sudo mount /dev/mmcblk1p1 /mnt/system
+grep "rootdev" /mnt/system/boot/armbianEnv.txt
+```
+Take note of UUID value and run,
+
+```
+sudo blkid
+```
+Verify if you have device with the same UUID. If the device is accessible, it might have corrupted filesystem. Run *fsck* to check and fix it.
+
+---
+
+## Problem: Serial console does not appear
+
+### Driver not installed
+
+Make sure you have FTDI VCP driver installed. You can download the driver from [FTDI Website](https://www.ftdichip.com/Drivers/VCP.htm)
+
+### Jumper P13 closed
+
+Make sure jumper P13 is open otherwise it will disable the built-in USB to Serial converter. Refer to [USB Console/Recovery Mode (P13)](/helios64/jumper/#usb-consolerecovery-mode-p13)
+
+### Cable is not plugged correctly
+
+When you put the back panel make sure to align the port and push a bit before securing with screw.
+
+![! backpanel connector](/helios64/img/troubleshoot/backplate_connector.jpg)
+
+If the USB-C port cannot hold the cable properly and loose the cable, you need to shave the cable a bit so the plastic does not touch the back panel.
+
+![! usb cable](/helios64/img/troubleshoot/usb_cable_shaved.jpg)
+
+Photo from [TDCroPower at Armbian Forum](https://forum.armbian.com/topic/15431-helios64-support/page/4/?tab=comments#comment-110859)
+
+---
+
+## Problem: I have broken bootloader on eMMC and unable to boot, how to force boot from micro SD ?
+
+Make sure the system is powered off and insert the micro SD card.
+Short [P10](/helios64/jumper/#boot-mode-p10-p11) with jumper cap, power on and remove the jumper cap before boot Linux (~5 seconds after power on).
+
+## Problem: How to clean up the eMMC
+
+### System still booting from eMMC after deleting the partition
+
+Bootloader located between first block and first partition. Clearing partition table does not remove the bootloader.
+
+Execute following command to erase Partition table, bootloader and partition superblock.
+
+```
+sudo dd if=/dev/zero of=/dev/mmcblk1 bs=512 count=65535
+sudo sync
+```

mkdocs.yml

@@ -80,6 +80,7 @@ nav:
     - eMMC Install : 'helios64/install/emmc.md'
     - SDcard Install : 'helios64/install/sdcard.md'
     - First Start : 'helios64/install/first-start.md'
+    - Transfer Installed OS: 'helios64/install/transfer.md'
   - Recovery :
     - Recovery Mode: '/helios64/button/#recovery-button'
     - Maskrom Mode: 'helios64/maskrom.md'
@@ -104,6 +105,7 @@ nav:
     - UEXT: 'helios64/uext.md'
     - USB: 'helios64/usb.md'
   - Documents: 'helios64/docs.md'
+  - Troubleshooting: 'helios64/troubleshoot.md'
 - Helios4:
   - Introduction: 'helios4/intro.md'
   - Kit Assembly: 'helios4/kit.md'