Following the install instructions, I'm able to get OpenWRT running on the mentioned routerboard. Unfortunately, root file system is temporary and every change disappears after the reboot. I can see no errors in dmesg output, so what could be wrong or what could I try to do? Thanks.
PS: already tried to erase mtd8 manually (mtd erase /dev/mtd8) and reboot without any difference in the behavior.
root@OpenWrt:~# df -h
Filesystem Size Used Available Use% Mounted on
tmpfs 121.9M 13.0M 108.9M 11% /
tmpfs 121.9M 52.0K 121.9M 0% /tmp
tmpfs 512.0K 0 512.0K 0% /dev
root@OpenWrt:~# dmesg
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.4.188 (builder@buildhost) (gcc version 8.4.0 (OpenWrt GCC 8.4.0 r16554-1d4dea6d4f)) #0 SMP Sat Apr 16 12:59:34 2022
[ 0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d
[ 0.000000] CPU: div instructions available: patching division code
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] OF: fdt: Machine model: MikroTik SXTsq 5 ac (RBSXTsqG-5acD)
[ 0.000000] Memory policy: Data cache writealloc
[ 0.000000] On node 0 totalpages: 65024
[ 0.000000] Normal zone: 576 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 65024 pages, LIFO batch:15
[ 0.000000] percpu: Embedded 15 pages/cpu s30156 r8192 d23092 u61440
[ 0.000000] pcpu-alloc: s30156 r8192 d23092 u61440 alloc=15*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 64448
[ 0.000000] Kernel command line:
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 238392K/260096K available (5799K kernel code, 190K rwdata, 880K rodata, 11264K init, 240K bss, 21704K reserved, 0K cma-reserved, 0K highmem)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] rcu: Hierarchical RCU implementation.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] random: get_random_bytes called from 0xc0a00cfc with crng_init=0
[ 0.000000] arch_timer: cp15 timer(s) running at 48.00MHz (virt).
[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0xb11fd3bfb, max_idle_ns: 440795203732 ns
[ 0.000007] sched_clock: 56 bits at 48MHz, resolution 20ns, wraps every 4398046511096ns
[ 0.000021] Switching to timer-based delay loop, resolution 20ns
[ 0.000238] Calibrating delay loop (skipped), value calculated using timer frequency.. 96.00 BogoMIPS (lpj=480000)
[ 0.000258] pid_max: default: 32768 minimum: 301
[ 0.000472] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.000493] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.001618] CPU: Testing write buffer coherency: ok
[ 0.002803] Setting up static identity map for 0x80300000 - 0x80300060
[ 0.002949] rcu: Hierarchical SRCU implementation.
[ 0.003449] smp: Bringing up secondary CPUs ...
[ 0.006814] smp: Brought up 1 node, 4 CPUs
[ 0.006836] SMP: Total of 4 processors activated (384.00 BogoMIPS).
[ 0.006844] CPU: All CPU(s) started in SVC mode.
[ 0.011340] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5
[ 0.011511] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.011538] futex hash table entries: 1024 (order: 4, 65536 bytes, linear)
[ 0.011812] pinctrl core: initialized pinctrl subsystem
[ 0.012935] NET: Registered protocol family 16
[ 0.013368] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.014702] cpuidle: using governor ladder
[ 0.014752] cpuidle: using governor menu
[ 0.033255] cryptd: max_cpu_qlen set to 1000
[ 0.036929] usbcore: registered new interface driver usbfs
[ 0.037001] usbcore: registered new interface driver hub
[ 0.037062] usbcore: registered new device driver usb
[ 0.037109] pps_core: LinuxPPS API ver. 1 registered
[ 0.037121] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.037149] PTP clock support registered
[ 0.038839] clocksource: Switched to clocksource arch_sys_counter
[ 0.039667] thermal_sys: Registered thermal governor 'step_wise'
[ 0.039988] NET: Registered protocol family 2
[ 0.040285] IP idents hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 0.041125] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[ 0.041171] TCP established hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.041215] TCP bind hash table entries: 2048 (order: 2, 16384 bytes, linear)
[ 0.041265] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.041408] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 0.041451] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 0.041699] NET: Registered protocol family 1
[ 0.041748] PCI: CLS 0 bytes, default 64
[ 0.206932] workingset: timestamp_bits=14 max_order=16 bucket_order=2
[ 0.212883] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.212901] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.263174] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[ 0.266006] bam-dma-engine 8e04000.dma: num-channels unspecified in dt
[ 0.266026] bam-dma-engine 8e04000.dma: num-ees unspecified in dt
[ 0.266709] tcsr 1949000.tcsr: setting wifi_glb_cfg = 41000000
[ 0.266816] tcsr 1953000.ess_tcsr: setting ess interface select = 0
[ 0.266912] tcsr 1957000.tcsr: setting wifi_noc_memtype_m0_m2 = 2222222
[ 0.267223] Serial: 8250/16550 driver, 16 ports, IRQ sharing enabled
[ 0.269286] msm_serial 78af000.serial: msm_serial: detected port #0
[ 0.269338] msm_serial 78af000.serial: uartclk = 1843200
[ 0.269398] 78af000.serial: ttyMSM0 at MMIO 0x78af000 (irq = 25, base_baud = 115200) is a MSM
[ 0.269429] msm_serial: console setup on port #0
[ 0.746027] printk: console [ttyMSM0] enabled
[ 0.751008] msm_serial: driver initialized
[ 0.760697] loop: module loaded
[ 0.761782] spi_qup 78b5000.spi: IN:block:16, fifo:64, OUT:block:16, fifo:64
[ 0.769761] random: fast init done
[ 0.772926] spi-nor spi0.0: w25q128jv (16384 Kbytes)
[ 0.773188] 3 fixed-partitions partitions found on MTD device spi0.0
[ 0.778273] Creating 3 MTD partitions on "spi0.0":
[ 0.784647] 0x000000000000-0x000000080000 : "Qualcomm"
[ 0.790202] 0x000000080000-0x000000100000 : "RouterBoot"
[ 0.800186] 3 routerbootpart partitions found on MTD device RouterBoot
[ 0.800218] Creating 3 MTD partitions on "RouterBoot":
[ 0.806143] 0x00000000e000-0x00000000f000 : "hard_config"
[ 0.812236] 0x000000010000-0x000000017c0c : "dtb_config"
[ 0.817601] 0x00000003d000-0x00000003e000 : "soft_config"
[ 0.823055] 0x000000100000-0x000001000000 : "firmware"
[ 0.832662] 2 minor-fw partitions found on MTD device firmware
[ 0.832694] Creating 2 MTD partitions on "firmware":
[ 0.838262] 0x000000000000-0x000000310000 : "kernel"
[ 0.844310] 0x000000310000-0x000000f00000 : "rootfs"
[ 0.849180] mtd: device 7 (rootfs) set to be root filesystem
[ 0.853484] 1 squashfs-split partitions found on MTD device rootfs
[ 0.858971] 0x000000680000-0x000000f00000 : "rootfs_data"
[ 1.068902] EDMA using MAC@ - using
[ 1.068919] 76:d5:dd:5b:5f:76
[ 1.172861] i2c /dev entries driver
[ 1.174887] sdhci: Secure Digital Host Controller Interface driver
[ 1.175157] sdhci: Copyright(c) Pierre Ossman
[ 1.181515] sdhci-pltfm: SDHCI platform and OF driver helper
[ 1.189986] MikroTik RouterBOARD hardware configuration sysfs driver v0.06
[ 1.192724] MikroTik RouterBOARD software configuration sysfs driver v0.03
[ 1.199498] NET: Registered protocol family 10
[ 1.206445] Segment Routing with IPv6
[ 1.209682] NET: Registered protocol family 17
[ 1.213329] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 1.217619] 8021q: 802.1Q VLAN Support v1.8
[ 1.230845] Registering SWP/SWPB emulation handler
[ 1.245795] hctosys: unable to open rtc device (rtc0)
[ 1.263108] Freeing unused kernel memory: 11264K
[ 1.312071] Run /init as init process
[ 1.739151] init: Console is alive
[ 1.739406] init: - watchdog -
[ 1.750502] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[ 1.762787] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[ 1.772571] init: - preinit -
[ 2.100327] random: jshn: uninitialized urandom read (4 bytes read)
[ 2.146610] random: jshn: uninitialized urandom read (4 bytes read)
[ 2.217468] random: jshn: uninitialized urandom read (4 bytes read)
[ 2.552010] ess_edma c080000.edma eth0: Link is Down
[ 5.691503] ess_edma c080000.edma eth0: Link is Up - 1Gbps/Full - flow control off
[ 5.692298] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 6.779567] ess_edma c080000.edma eth0: Link is Down
[ 6.787130] procd: - early -
[ 6.787282] procd: - watchdog -
[ 7.335278] procd: - watchdog -
[ 7.339956] procd: - ubus -
[ 7.365326] urandom_read: 5 callbacks suppressed
[ 7.365340] random: ubusd: uninitialized urandom read (4 bytes read)
[ 7.391862] random: ubusd: uninitialized urandom read (4 bytes read)
[ 7.399538] procd: - init -
[ 7.740558] kmodloader: loading kernel modules from /etc/modules.d/*
[ 7.744317] urngd: v1.0.2 started.
[ 7.748434] Loading modules backported from Linux version v5.10.110-0-g3238bffaf992
[ 7.749323] Backport generated by backports.git v5.10.110-1-0-g1fbde860
[ 7.767488] xt_time: kernel timezone is -0000
[ 7.801689] PPP generic driver version 2.4.2
[ 7.802596] NET: Registered protocol family 24
[ 7.809799] crng init done
[ 8.464556] ath10k_ahb a800000.wifi: qca4019 hw1.0 target 0x01000000 chip_id 0x003b00ff sub 0000:0000
[ 8.464610] ath10k_ahb a800000.wifi: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
[ 8.477580] ath10k_ahb a800000.wifi: firmware ver 10.4b-ct-4019-fW-13-5ae337bb1 api 5 features mfp,peer-flow-ctrl,txstatus-noack,wmi-10.x-CT,ratemask-CT,regdump-CT,txrate-CT,flush-all-CT,pingpong-CT,ch-regs-CT,nop-CT,set-special-CT,tx-rc-CT,cust-stats-CT,txrate2-CT,beacon-cb-CT,wmi-block-ack-CT,wmi-bcn-rc-CT crc32 6b2b5c5b
[ 8.534580] ath10k_ahb a800000.wifi: board_file api 2 bmi_id 0:17 crc32 e2dfaa91
[ 9.824386] ath10k_ahb a800000.wifi: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 9.824432] ath10k_ahb a800000.wifi: msdu-desc: 2500 skid: 32
[ 9.860228] ath10k_ahb a800000.wifi: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 9.861196] ath10k_ahb a800000.wifi: wmi print 'free: 53252 iram: 13432 sram: 35752'
[ 9.986424] ath10k_ahb a800000.wifi: htt-ver 2.2 wmi-op 6 htt-op 4 cal pre-cal-file max-sta 32 raw 0 hwcrypto 1
[ 10.134750] ath: EEPROM regdomain: 0x0
[ 10.134760] ath: EEPROM indicates default country code should be used
[ 10.134763] ath: doing EEPROM country->regdmn map search
[ 10.134774] ath: country maps to regdmn code: 0x3a
[ 10.134779] ath: Country alpha2 being used: US
[ 10.134782] ath: Regpair used: 0x3a
[ 10.144040] kmodloader: done loading kernel modules from /etc/modules.d/*
[ 46.351368] br-lan: port 1(eth0) entered blocking state
[ 46.351414] br-lan: port 1(eth0) entered disabled state
[ 46.355952] device eth0 entered promiscuous mode
[ 49.451686] ess_edma c080000.edma eth0: Link is Up - 1Gbps/Full - flow control off
[ 49.452455] br-lan: port 1(eth0) entered blocking state
[ 49.458297] br-lan: port 1(eth0) entered forwarding state
[ 49.464690] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready