root@OpenWrt:~# mount
/dev/root on /rom type squashfs (ro,relatime,errors=continue)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime)
/dev/fitrw on /overlay type f2fs (rw,lazytime,noatime,background_gc=on,nogc_merge,discard,discard_unit=block,user_xattr,inline_xattr,acl,inline_data,inline_dentry,flush_merge
,barrier,extent_cache,mode=adaptive,active_logs=6,alloc_mode=reuse,checkpoint_merge,fsync_mode=posix,memory=normal,errors=continue)
overlayfs:/overlay on / type overlay (rw,noatime,lowerdir=/,upperdir=/overlay/upper,workdir=/overlay/work,xino=off)
tmpfs on /dev type tmpfs (rw,nosuid,noexec,noatime,size=512k,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,noatime,mode=600,ptmxmode=000)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,noatime)
bpffs on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,noatime,mode=700)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,noatime)

root@OpenWrt:~# cat /proc/mounts
/dev/root /rom squashfs ro,relatime,errors=continue 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
cgroup2 /sys/fs/cgroup cgroup2 rw,nosuid,nodev,noexec,relatime,nsdelegate 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev,noatime 0 0
/dev/fitrw /overlay f2fs rw,lazytime,noatime,background_gc=on,nogc_merge,discard,discard_unit=block,user_xattr,inline_xattr,acl,inline_data,inline_dentry,flush_merge,barrier,
extent_cache,mode=adaptive,active_logs=6,alloc_mode=reuse,checkpoint_merge,fsync_mode=posix,memory=normal,errors=continue 0 0
overlayfs:/overlay / overlay rw,noatime,lowerdir=/,upperdir=/overlay/upper,workdir=/overlay/work,xino=off 0 0
tmpfs /dev tmpfs rw,nosuid,noexec,noatime,size=512k,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,noatime,mode=600,ptmxmode=000 0 0
debugfs /sys/kernel/debug debugfs rw,nosuid,nodev,noexec,noatime 0 0
bpffs /sys/fs/bpf bpf rw,nosuid,nodev,noexec,noatime,mode=700 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,noatime 0 0

root@OpenWrt:~# blkid
[   45.315079] mtdblock: MTD device 'ubi' is NAND, please consider using UBI block devices instead.
[   45.728184] mtdblock: MTD device 'bl2' is NAND, please consider using UBI block devices instead.
/dev/ubi0_6: UUID="83a33ce6-adce-43fb-8f9c-72ec04ceb68e" TYPE="ubifs"
/dev/mmcblk0p128: PARTUUID="5452574f-2211-4433-5566-778899aabb80"
/dev/mmcblk0p5: PARTLABEL="production" PARTUUID="5452574f-2211-4433-5566-778899aabb05"
/dev/mmcblk0p3: PARTLABEL="fip" PARTUUID="5452574f-2211-4433-5566-778899aabb03"
/dev/mmcblk0p1: PARTLABEL="ubootenv" PARTUUID="5452574f-2211-4433-5566-778899aabb01"
/dev/mmcblk0p4: PARTLABEL="recovery" PARTUUID="5452574f-2211-4433-5566-778899aabb04"
/dev/mmcblk0p2: PARTLABEL="factory" PARTUUID="5452574f-2211-4433-5566-778899aabb02"
/dev/fit0: BLOCK_SIZE="262144" TYPE="squashfs"
/dev/mtdblock0: TYPE="ubi"
/dev/fitrw: LABEL="rootfs_data" UUID="7a9f3e4b-0313-4b59-a40d-81bab7ea8dd4" BLOCK_SIZE="4096" TYPE="f2fs"

root@OpenWrt:~# lsblk -ap
NAME               MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
/dev/loop0           7:0    0    0B  0 loop
/dev/loop1           7:1    0    0B  0 loop
/dev/loop2           7:2    0    0B  0 loop
/dev/loop3           7:3    0    0B  0 loop
/dev/loop4           7:4    0    0B  0 loop
/dev/loop5           7:5    0    0B  0 loop
/dev/loop6           7:6    0    0B  0 loop
/dev/loop7           7:7    0    0B  0 loop
/dev/mtdblock0      31:0    0  126M  0 disk
/dev/mtdblock1      31:1    0    2M  1 disk
/dev/mmcblk0       179:0    0  7.3G  0 disk
├─/dev/mmcblk0p1   179:1    0  512K  0 part
├─/dev/mmcblk0p2   179:2    0    2M  0 part
├─/dev/mmcblk0p3   179:3    0    4M  0 part
├─/dev/mmcblk0p4   179:4    0   32M  0 part
├─/dev/mmcblk0p5   179:5    0  7.2G  0 part
└─/dev/mmcblk0p128 259:0    0    4M  0 part
/dev/mmcblk0boot0  179:8    0    4M  1 disk
/dev/mmcblk0boot1  179:16   0    4M  1 disk
/dev/ubiblock0_2   254:0    0 11.1M  0 disk
/dev/fit0          259:1    0  5.6M  1 disk /rom
/dev/fitrw         259:2    0  7.2G  0 disk /overlay