mount =>

rootfs on / type rootfs (rw)
none on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
none on /proc type proc (rw,nosuid,nodev,noexec,relatime)
none on /root/dev type devtmpfs (rw,relatime,size=1033736k,nr_inodes=199429,mode=755)
none on /root/dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620)
/dev/nbd0 on /root type ext4 (ro,relatime,user_xattr,barrier=1,data=ordered)


cat /proc/mounts =>

rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
none /root/dev devtmpfs rw,relatime,size=1033736k,nr_inodes=199429,mode=755 0 0
none /root/dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620 0 0
/dev/nbd0 /root ext4 ro,relatime,user_xattr,barrier=1,data=ordered 0 0