Many thanks, utu.

Having no luck with toggling the option of Volume Management.

Have been repeating my own question in my head over and over, and the things just don't add up; having the privilege to un-mount the NTFS partition but to mount it! But, I did come across something bizarre.

I can mount and un-mount the partition as usual if the /KNOPPIX folder contains
-- KNOPPIX or,
-- KNOPPIX + knoppix-data.img or,
-- KNOPPIX + KNOPPIX1 + knoppix-data.img

The combo of KNOPPIX + KNOPPIX1 alone is a No-No!

The KNOPPIX1 contains the usual files seen in /ramdisk when booting with "KNOPPIX 2 noimage" plus a dummy file created by root with "dd bs=1M count=10 conv=notrunc if=/dev/zero of=/home/knoppix/dummy_file" . To create the compressed file, I simply followed the guide found on debian-knoppix mailing list https://lists.debian.org/debian-knop.../msg00005.html . That's all....