There should be no problem mounting NTFS partitions
with Knoppix, but from your messages, I should say
that the problem seems to be that the disk is not
Are you using a recent version of Knoppix (6.0.1 ?)
that could make a difference about the hardware support.
Have you tried manually to list the partitions on all disks ?
/sbin/fdisk -l /dev/hda (hdb, hdc, hdd, sda, sdb, sdc etc.)
this will tell you what disk are recognized.
Or may be, see if at startup what disks are recognized:
# dmesg | grep ATA