Hi Robert, *Where "exactly" is the "boot" folder on the partition in raw terms? Is it fat? etc.. * There are 2 folders in sdcard root:
- boot - rootfs The file system is FAT. Here is *lsblk* on my host Ubuntu pavel@ALABAMA:~$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 0 97M 1 loop /snap/core/9665 loop1 7:1 0 2,2M 1 loop /snap/gnome-system-monitor/145 loop2 7:2 0 55M 1 loop /snap/core18/1880 loop3 7:3 0 55,3M 1 loop /snap/core18/1885 loop4 7:4 0 96,6M 1 loop /snap/core/9804 loop5 7:5 0 956K 1 loop /snap/gnome-logs/100 loop6 7:6 0 956K 1 loop /snap/gnome-logs/93 loop7 7:7 0 276K 1 loop /snap/gnome-characters/550 loop8 7:8 0 276K 1 loop /snap/gnome-characters/539 loop9 7:9 0 255,6M 1 loop /snap/gnome-3-34-1804/36 loop10 7:10 0 161,4M 1 loop /snap/gnome-3-28-1804/128 loop11 7:11 0 2,4M 1 loop /snap/gnome-calculator/730 loop12 7:12 0 2,2M 1 loop /snap/gnome-system-monitor/148 loop13 7:13 0 2,4M 1 loop /snap/gnome-calculator/748 loop14 7:14 0 140,7M 1 loop /snap/gnome-3-26-1604/98 loop15 7:15 0 255,6M 1 loop /snap/gnome-3-34-1804/33 loop16 7:16 0 54,8M 1 loop /snap/gtk-common-themes/1502 loop17 7:17 0 160,2M 1 loop /snap/gnome-3-28-1804/116 loop18 7:18 0 62,1M 1 loop /snap/gtk-common-themes/1506 loop19 7:19 0 140,7M 1 loop /snap/gnome-3-26-1604/100 sda 8:0 1 14,9G 0 disk ├─sda1 8:1 1 64M 0 part /media/pavel/boot └─sda2 8:2 1 1G 0 part /media/pavel/rootfs nvme0n1 259:0 0 238,5G 0 disk └─nvme0n1p1 259:1 0 238,5G 0 part / pavel@ALABAMA:~$ Here is fragment of *fdisk*: Device Boot Start End Sectors Size Id Type /dev/sda1 * 2048 133119 131072 64M c W95 FAT32 (LBA) /dev/sda2 133120 2230271 2097152 1G 83 Linux To format sdcard I used script from here: format-sdcard.sh <https://github.com/PacktPublishing/Mastering-Embedded-Linux-Programming-Second-Edition> Thanks, Sincerely, Pavel On Thursday, August 13, 2020 at 8:46:17 PM UTC+2, RobertCNelson wrote: > > On Thu, Aug 13, 2020 at 12:58 PM Pavel Yermolenko <[email protected] > <javascript:>> wrote: > > > > Hello, > > > > After copying MLO and u-boot.img in the boot folder of microSD and then > powering BeagleBone Black ((1) press and hold the Boot Switch button, (2) > power up the board; (3) release the Boot Switch button after about 5 > seconds) I don't see U-Boot# prompt in terminal. > > Instead, I see continuous activity in the terminal. > > "continuous activity" can you share what you actually get over serial? > > The BootRom on the AM335x is actually more picky than that.. Where > "exactly" is the "boot" folder on the partition in raw terms? Is it > fat? etc.. > > In the old days, when we used FAT and real files, the FAT partition > must be at the very start of the medium, size really doesn't matter, > we used a partition size of 96MB thru 16MB over the years. Next, after > formatting, it's was always way more reliable to write the "MLO" file > 1st, then the "u-boot.img"... Fun ROM bugs.. > > Today we just leave a 4MB hole and dd the files to a very specific > address on the medium.. It's more reliable, (unless you use a Linux > Virtual machine on top of Windows, then it seems to never be correctly > written..) > > sudo dd if=./MLO of=/dev/sdb count=1 seek=1 bs=128k > sudo dd if=./u-boot.img of=/dev/sdb count=2 seek=1 bs=384k > > Regards, > > > -- > Robert Nelson > https://rcn-ee.com/ > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/c25d9a93-3ba7-46cf-a242-26922cf7465bo%40googlegroups.com.
