XU8

SD card

root@daq13:~# fdisk -l /dev/sdd
Disk /dev/sdd: 29.28 GiB, 31439454208 bytes, 61405184 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
Disklabel type: dos

Device     Boot   Start     End Sectors  Size Id Type
/dev/sdd1          8192 2097151 2088960 1020M  c W95 FAT32 (LBA)
/dev/sdd2       2097152 6291455 4194304    2G 83 Linux
/dev/sdd3       6291456 8388607 2097152    1G 83 Linux
root@daq13:~# 
root@daq13:~# mount /dev/sdd1 /mnt
root@daq13:~# ls -l /mnt
total 18060
-rw-r--r-- 1 olchansk users 9455980 Aug 15 15:00 BOOT.BIN
-rw-r--r-- 1 olchansk users    2007 Dec  2  2022 boot.scr
-rw-r--r-- 1 olchansk users 8506496 Dec  2  2022 image.ub
-rw-r--r-- 1 olchansk users  262144 Dec 31  1979 uboot.env
-rw-r--r-- 1 olchansk users  262144 Dec 31  1979 uboot-redund.env
root@daq13:~# 

Make new card

• use 8GB, 16GB or 32GB SD card
• fdisk /dev/sdX ### as above, only VFAT partition 1 is used
• mkfs.vfat /dev/sdX1
• e2label /dev/sdX1 BOOT
• mount /dev/sdX1 /mnt
• rsync boot files
• unmount, eject