Препятствование тому, чтобы точка монтирования AIX писала для укоренения файловой системы

Does AIX let you mount a filesystem over an existing filesystem? Under Linux, you could do something like this:

# mount -t tmpfs -o ro none /mnt/fs

So now /mnt/fs is a read-only filesystem:

# touch /mnt/fs
touch: cannot touch `/mnt/fs/foo': Read-only file system

But you can mount something over it like this:

# mount /dev/myvg/mylv /mnt/fs

And that filesystem is writable:

# touch /mnt/fs/foo
# ls /mnt/fs
foo

If the second mount fails, you're still left with a read-only filesystem. If AIX supports this sort of overlapping mount this might do what you want.