Hello, I have try to boot my TS-219 with kernel 5.9.0-4-marvell from USB.
Marvell>> fatload usb 0:1 0x800000 kernel reading kernel 2329698 bytes read Marvell>> bootm 0x800000 ## Booting image at 00800000 ... Image Name: kernel 5.9.0-4-marvell Created: 2020-12-05 19:50:52 UTC Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2329634 Bytes = 2.2 MB Load Address: 00008000 Entry Point: 00008000 Verifying Checksum ... OK OK Starting kernel ... ... [ 0.060418] Trying to unpack rootfs image as initramfs... [ 0.060445] Initramfs unpacking failed: invalid magic at start of compressed archive ... [ 1.136226] No filesystem could mount root, tried: [ 1.136228] [ 1.142637] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0) [ 1.150941] CPU: 0 PID: 1 Comm: swapper Not tainted 5.9.0-4-marvell #1 Debian 5.9.11-1 [ 1.158888] Hardware name: Marvell Kirkwood (Flattened Device Tree) [ 1.165195] [<c0014a4c>] (unwind_backtrace) from [<c00119d4>] (show_stack+0x18/0x1c) [ 1.172969] [<c00119d4>] (show_stack) from [<c044bee8>] (panic+0xdc/0x308) [ 1.179880] [<c044bee8>] (panic) from [<c05c15b4>] (mount_block_root+0x29c/0x330) [ 1.187395] [<c05c15b4>] (mount_block_root) from [<c05c180c>] (prepare_namespace+0x148/0x184) [ 1.195957] [<c05c180c>] (prepare_namespace) from [<c044fe94>] (kernel_init+0x10/0x100) [ 1.203995] [<c044fe94>] (kernel_init) from [<c0008320>] (ret_from_fork+0x14/0x34) [ 1.211593] Exception stack(0xdf4c3fb0 to 0xdf4c3ff8) [ 1.216661] 3fa0: 00000000 00000000 00000000 00000000 [ 1.224868] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1.233081] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 1.239721] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0) ]--- The initrd is xz compressed. I would try a non-compressed initrd but I have no idea how to set the memory addresses in uboot bootargs for the corect size. root@qnap:/mnt# ls -la insgesamt 46152 drwxr-xr-x 2 root root 4096 5. Dez 21:18 . drwxr-xr-x 23 root root 4096 1. Feb 2017 .. -rwxr-xr-x 1 root root 23948800 5. Dez 21:18 initrd -rwxr-xr-x 1 root root 9437184 4. Dez 17:13 initrd.old -rwxr-xr-x 1 root root 9437184 5. Dez 21:17 initrd.xz -rwxr-xr-x 1 root root 2329698 5. Dez 21:17 kernel -rwxr-xr-x 1 root root 2097152 4. Dez 17:13 kernel.old root@qnap:/mnt# Kernel 4.19 load without problems. Best Regards