root@atde9:/home/atmark/sdboot/build-rootfs-v3.19-at.4# ./build_image.sh --board a6e --boot ../u-boot-aiotg-a6e-v2020.04-at21.imx 
use default(outdir=/home/atmark/sdboot/build-rootfs-v3.19-at.4)
use default(output=baseos-6e-3.19.1-at.4.20240617.img)
Warning: Partition table header claims that the size of partition table
entries is 0 bytes, but this program  supports only 128-byte entries.
Adjusting accordingly, but partition table may be garbage.
Warning: Partition table header claims that the size of partition table
entries is 0 bytes, but this program  supports only 128-byte entries.
Adjusting accordingly, but partition table may be garbage.
Creating new GPT entries in memory.
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot or after you
run partprobe(8) or kpartx(8)
GPT data structures destroyed! You may now partition the disk using fdisk or
other utilities.
Setting name!
partNum is 0
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot or after you
run partprobe(8) or kpartx(8)
The operation has completed successfully.
mke2fs 1.46.2 (28-Feb-2021)
Found a gpt partition table in baseos-6e-3.19.1-at.4.20240617.img
Discarding device blocks: done                            
Creating filesystem with 307200 1k blocks and 76912 inodes
Filesystem UUID: 297bb37d-4d1f-4bc1-b104-8481edb991ae
Superblock backups stored on blocks: 
	8193, 24577, 40961, 57345, 73729, 204801, 221185

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done 


Successfully built /home/atmark/sdboot/build-rootfs-v3.19-at.4/baseos-6e-3.19.1-at.4.20240617.img
root@atde9:/home/atmark/sdboot/build-rootfs-v3.19-at.4# sudo umount /dev/sdb1
root@atde9:/home/atmark/sdboot/build-rootfs-v3.19-at.4# sudo dd if=../build-rootfs-v3.19-at.4/baseos-6e-3.19.1-at.4.20240617.img \
> of=/dev/sdb bs=1M oflag=direct status=progress
335544320 bytes (336 MB, 320 MiB) copied, 92 s, 3.6 MB/s
321+0 レコード入力
321+0 レコード出力
336592896 bytes (337 MB, 321 MiB) copied, 92.429 s, 3.6 MB/s