ZyXEL NBG6817 questions

root@NBG6817:~# ubus call system board
{
	"kernel": "5.15.137",
	"hostname": "NBG6817",
	"system": "ARMv7 Processor rev 0 (v7l)",
	"model": "ZyXEL NBG6817",
	"board_name": "zyxel,nbg6817",
	"rootfs_type": "squashfs",
	"release": {
		"distribution": "OpenWrt",
		"version": "23.05.2",
		"revision": "r23630-842932a63d",
		"target": "ipq806x/generic",
		"description": "OpenWrt 23.05.2 r23630-842932a63d"
	}
}

Flash MB: 4096
RAM MB: 512


root@NBG6817:~# df -hT
Filesystem           Type            Size      Used Available Use% Mounted on
/dev/root            squashfs        4.8M      4.8M         0 100% /rom
tmpfs                tmpfs         233.2M     64.0K    233.1M   0% /tmp
/dev/loop0           ext4           52.2M     79.0K     48.0M   0% /overlay
overlayfs:/overlay   overlay        52.2M     79.0K     48.0M   0% /
tmpfs                tmpfs         512.0K         0    512.0K   0% /dev

Free RAM:

root@NBG6817:~# free
              total        used        free      shared  buff/cache   available
Mem:         477496       36896      423864          64       16736      407628
Swap:             0           0           0

Why doesn't openwrt use more space of the available 4GB?

Do I understand correctly, that 256MB are used by openwrt? I read, that it can be expanded somehow, but why isn't the available space used from the beginning?

root@NBG6817:~# opkg list-installed | grep ath10
ath10k-board-qca9984 - 20230804-1
ath10k-firmware-qca9984-ct - 2020-11-08-1
kmod-ath10k-ct - 5.15.137+2022-05-13-f808496f-5

Do I have to replace for mesh the ct-versions?

openwrt tries to keep the default flash layout intact, when possible, makes it possible/easier to flash back to stock fw.

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Because the OEM partitioning sets this up as 2*(4+64) MB, leaving a large 3.2GB partition mostly untouched as streamboost cache.

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