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4.1
System Recovery
This section provides detail procedures of restoring the eMMC image. If you destroy the onboard flash
image by accident, you can recover a system following these steps.
Boot mode selection of ROM-8720 with "SW1" switch
Switch item
SW-1
On (boot from Micro SD/eMMC)
SW-2
On (boot from Micro SD)
(Only work
in SW-1 On)
1. Copy 8720S1AIM30UIV00009_2022-08-12_img.tar.gz package to your desktop.
2. Insert SD card to PC
3. Make a bootable sd card
$ tar xzvf 8720P1AIM30UIV00009_2022-08-12_img.tar.gz
$ cd ls1046arom8720_p1.out/
$ sudo flex-installer -i pf -d /dev/sdg
$ sudo flex-installer -f firmware_ls1046arom8720_p1_uboot_sdboot.img -b
bootpartition_LS_arm64_lts_5.4_202208120200.tgz -r
rootfs_lsdk2012_ubuntu_main_arm64.sdcard.tgz -d /dev/sdg
$ sync
4
Insert USB disk to PC
.
5. Burn root filesytem in USB disk
$ sudo flex-installer -i pf -d /dev/sdh
$ sudo flex-installer -b bootpartition_LS_arm64_lts_5.4_202208120200.tgz -r
rootfs_lsdk2012_ubuntu_main_arm64.sdcard.tgz -d /dev/sdh
$ sync
6. Insert SD card and Boot from SD.
7. Burn bootloader to QSPI
$ /usr/bin/flash_qspi.sh
$ sync
8. Power down
9. Unplug SD card & Insert USB disk
10. Boot on QSPI mode
11. Enter U-Boot console and force into USB root filesystem
$ (U-BOOT Console)
Settings
Off (boot from QSPI for recovery mode)
Off (boot from eMMC if there is no Micro
SD exiting)
21
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