I have a GL-X750V2. I installed the new OpenWRT 22.03.4 and then I followed the instructions to extend the space with a 32GB SD card:
https://openwrt.org/docs/guide-user/additional-software/extroot_configuration
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|| W I R E L E S S F R E E D O M
OpenWrt 22.03.4, r20123-38ccc47687
root@GL-X750:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 12.0M 12.0M 0 100% /rom
tmpfs 59.2M 372.0K 58.8M 1% /tmp
/dev/sda1 29.2G 1.7M 27.7G 0% /overlay
overlayfs:/overlay 29.2G 1.7M 27.7G 0% /
tmpfs 512.0K 0 512.0K 0% /dev
/dev/mtdblock6 1.4M 856.0K 552.0K 61% /rwm
Summary
root@GL-X750:~# ls -l /sys/block
lrwxrwxrwx 1 root root 0 Apr 26 18:38 mtdblock0 → …/devices/platform/ahb/1f000000.spi/spi_master/spi0/spi0.0/mtd/mtd0/mtdblock0
lrwxrwxrwx 1 root root 0 Apr 26 18:38 mtdblock1 → …/devices/platform/ahb/1f000000.spi/spi_master/spi0/spi0.0/mtd/mtd1/mtdblock1
lrwxrwxrwx 1 root root 0 Apr 26 18:38 mtdblock2 → …/devices/platform/ahb/1f000000.spi/spi_master/spi0/spi0.0/mtd/mtd2/mtdblock2
lrwxrwxrwx 1 root root 0 Apr 26 18:38 mtdblock3 → …/devices/platform/ahb/1f000000.spi/spi_master/spi0/spi0.0/mtd/mtd3/mtdblock3
lrwxrwxrwx 1 root root 0 Apr 26 18:38 mtdblock4 → …/devices/platform/ahb/1f000000.spi/spi_master/spi0/spi0.0/mtd/mtd3/mtd4/mtdblock4
lrwxrwxrwx 1 root root 0 Apr 26 18:38 mtdblock5 → …/devices/platform/ahb/1f000000.spi/spi_master/spi0/spi0.0/mtd/mtd3/mtd5/mtdblock5
lrwxrwxrwx 1 root root 0 Apr 26 18:38 mtdblock6 → …/devices/platform/ahb/1f000000.spi/spi_master/spi0/spi0.0/mtd/mtd3/mtd6/mtdblock6
lrwxrwxrwx 1 root root 0 Apr 26 18:33 sda → …/devices/platform/ahb/1b000000.usb/usb1/1-1/1-1.1/1-1.1:1.0/host0/target0:0:0/0:0:0:0/block/sda
root@GL-X750:~# DISK=“/dev/sda”
root@GL-X750:~# parted -s ${DISK} – mklabel gpt mkpart extroot 2048s -2048s
root@GL-X750:~# DEVICE=“${DISK}1”
root@GL-X750:~# mkfs.ext4 -L extroot ${DEVICE}
mke2fs 1.46.5 (30-Dec-2021)
Creating filesystem with 7814656 4k blocks and 1954064 inodes
Filesystem UUID: ed0d7530-c172-41a2-b0ca-224f0a827e33
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
root@GL-X750:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 12.0M 12.0M 0 100% /rom
tmpfs 59.2M 412.0K 58.8M 1% /tmp
/dev/mtdblock6 1.4M 852.0K 556.0K 61% /overlay
overlayfs:/overlay 1.4M 852.0K 556.0K 61% /
tmpfs 512.0K 0 512.0K 0% /dev
root@GL-X750:~# eval $(block info ${DEVICE} | grep -o -e ‘UUID=“\S*”’)
root@GL-X750:~# eval $(block info | grep -o -e ‘MOUNT=“\S*/overlay”’)
root@GL-X750:~# uci -q delete fstab.extroot
root@GL-X750:~# uci set fstab.extroot=“mount”
root@GL-X750:~# uci set fstab.extroot.uuid=“${UUID}”
root@GL-X750:~# uci set fstab.extroot.target=“${MOUNT}”
root@GL-X750:~# uci commit fstab
root@GL-X750:~# ORIG=“$(block info | sed -n -e '/MOUNT=”\S*/overlay"/s/:\s.*$//p’)"
root@GL-X750:~# uci -q delete fstab.rwm
root@GL-X750:~# uci set fstab.rwm=“mount”
root@GL-X750:~# uci set fstab.rwm.device=“${ORIG}”
root@GL-X750:~# uci set fstab.rwm.target=“/rwm”
root@GL-X750:~# uci commit fstab
root@GL-X750:~# mount ${DEVICE} /mnt
root@GL-X750:~# tar -C ${MOUNT} -cvf - . | tar -C /mnt -xf -
./
./upper/
./upper/etc/
./upper/etc/gl_crontabs/
./upper/etc/gl_crontabs/crontabs.d/
./upper/etc/gl_crontabs/crontabs.d/modem_status_monitor
./upper/etc/oui-tertf/
./upper/etc/oui-tertf/client.db
./upper/etc/nginx/
./upper/etc/nginx/nginx.conf
./upper/etc/nginx/conf.d/
./upper/etc/nginx/conf.d/gl.conf
./upper/etc/nginx/oui_nginx.conf
./upper/etc/nginx/nginx.key
./upper/etc/nginx/nginx.conf_old
./upper/etc/nginx/nginx.cer
./upper/etc/config/
./upper/etc/config/gl-tertf
./upper/etc/config/rtty
./upper/etc/config/glforward
./upper/etc/config/vpnpolicy
./upper/etc/config/ovpnclient
./upper/etc/config/wan-access
./upper/etc/config/gl_timer
./upper/etc/config/glipv6
./upper/etc/config/rpcd
./upper/etc/config/gl_s2s
./upper/etc/config/gl_block
./upper/etc/config/gl-cloud
./upper/etc/config/glconfig
./upper/etc/config/gl_led
./upper/etc/config/fstab
./upper/etc/config/ubootenv
./upper/etc/config/network
./upper/etc/config/gl_mwan3
./upper/etc/config/wireguard_server
./upper/etc/config/ovpnserver
./upper/etc/config/wireguard
./upper/etc/config/stubby
./upper/etc/config/repeater
./upper/etc/config/openssl
./upper/etc/config/openvpn
./upper/etc/config/mwan3
./upper/etc/config/ddns
./upper/etc/config/firewall
./upper/etc/config/edgerouter
./upper/etc/config/switch-button
./upper/etc/config/system
./upper/etc/config/oui-httpd
./upper/etc/config/gl_macclone
./upper/etc/config/upgrade
./upper/etc/config/dropbear
./upper/etc/config/custom_apn
./upper/etc/config/luci
./upper/etc/config/gl_ddns
./upper/etc/config/dnscrypt-proxy
./upper/etc/config/glmodem
./upper/etc/config/qos
./upper/etc/config/board_special
./upper/etc/config/gl-dns
./upper/etc/config/plugins
./upper/etc/config/gl_logread
./upper/etc/config/wireless
./upper/etc/config/dhcp
./upper/etc/config/apnprofile
./upper/etc/config/ucitrack
./upper/etc/lockdown/
./upper/etc/sysctl.d/
./upper/etc/sysctl.d/99-disable-ipv6.conf
./upper/etc/sysctl.d/12-free-kbytes.conf
./upper/etc/oui/
./upper/etc/oui/oui.db
./upper/etc/spool/
./upper/etc/spool/sms/
./upper/etc/spool/sms/failed/
./upper/etc/spool/sms/failed/1-1.2/
./upper/etc/spool/sms/incoming/
./upper/etc/spool/sms/incoming/1-1.2/
./upper/etc/spool/sms/outgoing/
./upper/etc/spool/sms/outgoing/1-1.2/
./upper/etc/spool/sms/checked/
./upper/etc/spool/sms/checked/1-1.2/
./upper/etc/spool/sms/sent/
./upper/etc/spool/sms/sent/1-1.2/
./upper/etc/shadow
./upper/etc/openvpn/
./upper/etc/openvpn/scripts/
./upper/etc/openvpn/scripts/ovpnclient-down
./upper/etc/openvpn/scripts/ovpnserver-up
./upper/etc/openvpn/scripts/checkpsw.sh
./upper/etc/openvpn/scripts/ovpnclient-up
./upper/etc/init.d/
./upper/etc/init.d/gl-cloud
./upper/etc/init.d/sysntpd
./upper/etc/rc.d/
./upper/etc/rc.d/S96led
./upper/etc/rc.d/S94usbmuxd
./upper/etc/rc.d/S99rtty
./upper/etc/dropbear/
./upper/etc/dropbear/dropbear_rsa_host_key
./upper/etc/dropbear/dropbear_ed25519_host_key
./upper/etc/fw_env.config
./upper/etc/group
./upper/etc/firmware_type
./upper/etc/urandom.seed
./upper/etc/passwd
./upper/etc/passwd-
./upper/etc/ssl/
./upper/etc/ssl/gl.conf
./upper/etc/opkg/
./upper/etc/opkg/distfeeds.conf
./upper/etc/uci-defaults/
./upper/etc/uci-defaults/13_fix_ipv6_config
./upper/etc/uci-defaults/zzz-mwan3-keep-glsdk3-config
./upper/etc/uci-defaults/50-migrate-rpcd-ubus-sock.sh
./upper/etc/uci-defaults/14_migrate-dhcp-release
./upper/etc/uci-defaults/15_odhcpd
./upper/etc/uci-defaults/99-set-monitor
./upper/etc/uci-defaults/99-set_modem.sh
./upper/etc/uci-defaults/zzz-network-keep-glsdk3-config
./upper/etc/uci-defaults/mwan3-migrate-flush_conntrack
./upper/etc/uci-defaults/luci-i18n-opkg-zh-cn
./upper/etc/uci-defaults/gl-cloud
./upper/etc/uci-defaults/99-firewall
./upper/etc/uci-defaults/80_nginx-oui
./upper/etc/uci-defaults/glblock
./upper/etc/uci-defaults/01_gl_system
./upper/etc/uci-defaults/zzz-passwork-keep-glsdk3-config
./upper/etc/uci-defaults/14-fix-edgerouter-keepsetting
./upper/etc/uci-defaults/16_fix_ovpn_dns_leak_keep
./upper/etc/uci-defaults/00-gl-hw-env
./upper/etc/uci-defaults/20_migrate-feeds
./upper/etc/uci-defaults/zzz-wireless-keep-glsdk3-config
./upper/etc/uci-defaults/99-vpnpolicy
./upper/etc/uci-defaults/04_led_migration
./upper/etc/uci-defaults/30_luci-theme-bootstrap
./upper/etc/uci-defaults/17_fix_ax1800_upgrade_url
./upper/etc/uci-defaults/13_add_nat6_to_firewall
./upper/etc/uci-defaults/zzzz_gl_init_done
./upper/etc/uci-defaults/12_network-generate-ula
./upper/etc/uci-defaults/99-verizon
./upper/etc/uci-defaults/luci-i18n-firewall-zh-cn
./upper/etc/uci-defaults/30_uboot-envtools
./upper/etc/uci-defaults/03_gl_switch
./upper/etc/uci-defaults/02_gl_wifi
./upper/etc/uci-defaults/99-mwan3
./upper/etc/uci-defaults/10_migrate-shadow
./upper/etc/uci-defaults/19-set-hardware-params
./upper/etc/uci-defaults/luci-i18n-base-zh-cn
./upper/etc/uci-defaults/17_fix_glconfig_wan2lan_init
./upper/etc/uci-defaults/50_rtty
./upper/etc/uci-defaults/network_gl
./upper/etc/uci-defaults/50_luci-mod-admin-full
./upper/etc/uci-defaults/02_gl_fan
./upper/etc/uci-defaults/zzz-goodcloud-keep-glsdk3-config
./upper/etc/uci-defaults/50-dnsmasq-migrate-resolv-conf-auto.sh
./upper/etc/uci-defaults/gl-s2s.defaults
./upper/etc/uci-defaults/15_fix_glconfig_track_ip
./upper/etc/uci-defaults/13_fix-group-user
./upper/etc/uci-defaults/z-2b-cfg
./upper/etc/uci-defaults/10-fstab
./upper/etc/uci-defaults/dhcp_server
./upper/etc/firewall.in_conn_mark.nft
./upper/etc/board.json
./upper/etc/shadow-
./upper/usr/
./upper/usr/uwsgi_temp/
./upper/usr/share/
./upper/usr/share/nftables.d/
./upper/usr/share/nftables.d/chain-pre/
./upper/usr/share/nftables.d/chain-pre/mangle_postrouting/
./upper/usr/share/nftables.d/chain-pre/mangle_output/
./upper/usr/share/nftables.d/chain-pre/mangle_output/01-process_mark.nft
./upper/usr/share/terminfo/
./upper/usr/share/terminfo/v/
./upper/usr/share/terminfo/v/vt102
./upper/usr/share/terminfo/v/vt100
./upper/usr/share/terminfo/a/
./upper/usr/share/terminfo/a/ansi
./upper/usr/share/terminfo/r/
./upper/usr/share/terminfo/r/rxvt-unicode
./upper/usr/share/terminfo/r/rxvt
./upper/usr/share/terminfo/s/
./upper/usr/share/terminfo/s/screen-256color
./upper/usr/share/terminfo/s/screen
./upper/usr/share/terminfo/x/
./upper/usr/share/terminfo/x/xterm-color
./upper/usr/share/terminfo/x/xterm
./upper/usr/share/terminfo/x/xterm-256color
./upper/usr/share/terminfo/l/
./upper/usr/share/terminfo/l/linux
./upper/usr/share/terminfo/t/
./upper/usr/share/terminfo/t/tmux-256color
./upper/usr/share/terminfo/t/tmux
./upper/usr/share/terminfo/d/
./upper/usr/share/terminfo/d/dumb
./upper/usr/lib/
./upper/usr/lib/libparted.so
./upper/usr/lib/libmenu.so.6.3
./upper/usr/lib/libpanel.so.6.3
./upper/usr/lib/libreadline.so.8
./upper/usr/lib/libpanelw.so.6
./upper/usr/lib/libhistory.so.8.1
./upper/usr/lib/libncursesw.so.6
./upper/usr/lib/libmenuw.so.6
./upper/usr/lib/libformw.so.6.3
./upper/usr/lib/libparted-fs-resize.so.0.0.3
./upper/usr/lib/libncursesw.so.6.3
./upper/usr/lib/libpanelw.so.6.3
./upper/usr/lib/libreadline.so.8.1
./upper/usr/lib/libform.so.6
./upper/usr/lib/libpanel.so.6
./upper/usr/lib/libhistory.so.8
./upper/usr/lib/libparted.so.2
./upper/usr/lib/libparted-fs-resize.so
./upper/usr/lib/libform.so.6.3
./upper/usr/lib/libmenu.so.6
./upper/usr/lib/libparted-fs-resize.so.0
./upper/usr/lib/libncurses.so.6
./upper/usr/lib/libmenuw.so.6.3
./upper/usr/lib/libformw.so.6
./upper/usr/lib/opkg/
./upper/usr/lib/opkg/info/
./upper/usr/lib/opkg/info/terminfo.list
./upper/usr/lib/opkg/info/libreadline8.prerm
./upper/usr/lib/opkg/info/terminfo.postinst
./upper/usr/lib/opkg/info/parted.list
./upper/usr/lib/opkg/info/terminfo.control
./upper/usr/lib/opkg/info/libncurses6.control
./upper/usr/lib/opkg/info/libreadline8.list
./upper/usr/lib/opkg/info/libncurses6.prerm
./upper/usr/lib/opkg/info/libncurses6.postinst
./upper/usr/lib/opkg/info/libparted.postinst
./upper/usr/lib/opkg/info/libparted.prerm
./upper/usr/lib/opkg/info/libreadline8.postinst
./upper/usr/lib/opkg/info/parted.postinst
./upper/usr/lib/opkg/info/libparted.control
./upper/usr/lib/opkg/info/parted.control
./upper/usr/lib/opkg/info/libncurses6.list
./upper/usr/lib/opkg/info/terminfo.prerm
./upper/usr/lib/opkg/info/libreadline8.control
./upper/usr/lib/opkg/info/libparted.list
./upper/usr/lib/opkg/info/parted.prerm
./upper/usr/lib/opkg/status
./upper/usr/lib/libncurses.so.6.3
./upper/usr/lib/libparted.so.2.0.3
./upper/lib/
./upper/lib/firmware/
./upper/lib/firmware/ath10k/
./upper/lib/firmware/ath10k/cal-pci-0000:00:00.0.bin
./upper/sbin/
./upper/sbin/parted
./upper/sbin/partprobe
./work/
./work/work/
./work/work/#3
./.fs_state
root@GL-X750:~# reboot
root@GL-X750:~# client_loop: send disconnect: Connection reset