How can I force one of two KNOPPIX filesystems to be detected

[szzsqing1]

Rectification: in case of ISO boot you can resolve the problem, too. You can specify the ISO image file as boot parameter:

knoppix bootfrom=/dev/sda1/KNX.iso Access image, boot from ISO-Image

So you can rename the ISO files or put them in directories with unique names.

[don999]

You might also try to use the cheatcode fromhd

like

knoppix fromhd=/dev/sda1

On my asus eeepc 900a laptop, I can boot from different filesystems (internal HD, SD card reader, usb drive) using the BBS (bios boot selector) hitting ESC on startup,

however, that only controls the boot code. To actually select which one that knoppix uses, I have to use the fromhd parameter and I can switch between them using fromhd=(sda1, sdb1, or sdc1) (sda1 is internal, sdb1 is SD card, sdc1 is usb drive. if the SD card isn't there, the usb moves to sdb1)