submit some detail, which you can gather by gentle use of the gnu tool named: fdisk ... Do not confuse this with the m$ executable which sports the same name. The latter only understands (& only works with) older m$ partitions, and will not help us divine what filesystem is lurking on your /dev/hda5

To get to a Linux shell (e.g: Terminal) session, as root, Boot your Knoppix cd with any bootflags which help you simply get the LiveCD session going. Nothing fancy.

To become root, use the command:
su -
and leave the password line blank [hit Enter]

You will want to learn to recognise that the prompt symbol is no longer a dollar{"$"}. The prompt now reflects that root is current user, with a Pound symbol in the prompt string {"#"} also called hatch, or tictac(toe).

Do as little as possible as root, and your life will be more fun.

Do as little as possible with fdisk, below, and your partition scheme will live through our little foray for info. Stray, even a bit, and it can all go pear-shaped quickly. Poof. Your whole hard disk. All data. Gone. All programs. Gone.

You have been warned.

To invoke the gnu tool fdisk, issue the following as root, at a Linux bash prompt (except the lovely Pound symbol, you know what that means):
# fdisk /dev/hda

Ignore (for now, but read) any paragraph which may mention "1024 .. LILO .. 'other OS' ..".

Now that we are "running fdisk" it will only give us minimal prompts; the first is:
Command (m for help):

You will only need to use 3 choices:
m - 'help' .. shows a brief list of single-letter fdisk commands
p - prints current partition table (use this)
q - quits (use this as soon as you have jotted down the "p" info)

If you get stuck, Control_C will bail you from a certain apps.
Important: To finish a bash shell session on a Linux terminal, issue the command:
exit

Since we had a root session running inside a 'normal user' session, keep an eye on the prompt, as you issue one more of that command:
exit

Come back to this forum and Post the table as displayed by fdisk's "p" and we'll know better what to suggest for you.

JohnD