Hello, I am creating empty 4GB ext4 partition on emmc with parted like this: parted -s -a optimal /dev/emmcblk0 mkpart data ext4 1024 5120 mkfs.ext4 /dev/mmcblk0p7 (this is the partition that was created in the previous step) I do not mount this partition before I do dd of the emmc. dd of the emmc is done like this: dd if=/dev/emmcblk0 | gzip -c | dd of=./image.bin after this I write back the emmc with the same binary file: dd if=./image.bin | gunzip -c | dd of=. /dev/emmcblk0 now I boot the system and mount the partition from the emmc. at the boot the kernel reports: EXT4-fs (mmcblk0p7): warning: mounting fs with errors, running e2fsck is recommended after the system is fully booted I see errors such as: EXT4-fs error (device mmcblk0p7): ext4_journal_check_start:61: Detected aborted journal Buffer I/O error on dev mmcblk0p7, logical block 0, lost sync page write EXT4-fs (mmcblk0p7): I/O error while writing superblock All other partitions on the system are ReadOnly so probably that is why I do not see errors for them I am running custom Yocto build on this. the kernel is vanilla 5.4.57 with an additional pci driver we have. Any idea why this is happening? Thanks Ogi
