openEuler 22.03 root用户无法在/bin /usr/sbin /lib64 等目录写入文件?

操作系统信息

[root@pd selinux]# cat /etc/os-release
NAME="openEuler"
VERSION="22.03 (LTS-SP2)"
ID="openEuler"
VERSION_ID="22.03"
PRETTY_NAME="openEuler 22.03 (LTS-SP2)"
ANSI_COLOR="0;31"
[root@pd ~]# uname -a
Linux pd.lcj.cn 5.10.0-153.12.0.92.oe2203sp2.x86_64 #1 SMP Wed Jun 28 23:04:48 CST 2023 x86_64 x86_64 x86_64 GNU/Linux

selinux 关闭

[root@pd selinux]# getenforce
Disabled
[root@pd selinux]# df
Filesystem     1K-blocks     Used Available Use% Mounted on
devtmpfs            4096        0      4096   0% /dev
tmpfs            3937880     1068   3936812   1% /dev/shm
tmpfs            1575156    16772   1558384   2% /run
tmpfs               4096        0      4096   0% /sys/fs/cgroup
/dev/vda2       38909276  4116028  32784572  12% /
tmpfs            3937884        4   3937880   1% /tmp
/dev/vda1        2092000    96872   1995128   5% /boot
/dev/vdb1      536607728 29454236 507153492   6% /data
/dev/loop0      17722652 17722652         0 100% /mnt

可以在/bin/中创建目录,但不能写入文件

[root@pd ~]# mkdir /bin/tk
[root@pd ~]# echo "a">/bin/tk1
-bash: /bin/tk1: Permission denied

硬盘信息

[root@pd ~]# cat /etc/fstab
UUID=xxxx-xxxx-xxxx-xxxx    /    ext4    defaults  0 0
UUID=-xxxx /boot vfat defaults 0 0
UUID=xxxxx-xxxx-xxx-xxx-xxxx /data   xfs     defaults  0 0

各位有遇到这种问题吗?需要怎么处理?