(SOLVED) How to obtain a three boot entry menu

[agmg]

Assuming that USB drives will appear always in that order, the entry you propose is correct. Go on and try it out
You could also try Old-Polack's advice and have two entries in your menu.lst in case your Knoppix USB drive is seen before the Readyboost one.

Question 1: why do you use FAT32 on the Knoppix disk and not a Linux filesystem (such as ext3 or ext4)?
Question 2: does Readyboost really make any difference in Windows?

[The Chief]

Question 2: does Readyboost really make any difference in Windows?

Just jumping in here. 

I don't know for sure, as I've never tried it on the one Win7 machine in the house, but (logically) since most all machines now come with fairly adequate RAM installed, I seriously doubt it will make a noticeable difference.  Especially as it is much slower than the installed RAM.   Unless they are using it as a disk cache...

[unist]

Considering the sequence in my previous post, since the last disk recognized, out of the four (04), is the 8 GB Pendrive in which I have Knoppix 7.04, I thing that the last boot stanza for the /boot/grub/menu.lst should be:

title Knoppix 7.04
root (hd3,0)
chainloader +1

Am I correct?

Could be. When I have multiple drives, and not sure which will be seen as which, I make a number of stanzas with something in the titles to indicate the differences, then try each in turn to see which is the correct one. If I think I might later remove one of the drives, I leave all the stanzas in place, so I always have one that will work when that happens. I used to run with 7 hard drives in removable drive bays, and switch between the main drives and an additional 13 drives. (20 in all, with only the boot drive being constant most of the time) My menu.lst got pretty complicated, but I could always boot any installed OS from whichever drive position it happened to be in.

Drives got bigger, so now I only have one internal 2 TB drive, and two USB or eSATA connected external drives, of 750 GB and 1 TB capacity, which stay attached most of the time to my main machine. Each drive has a boot partition, and any one of them can be set as the boot drive and be able to boot any installation on any of the three drives. I have two other machines to which I can attach either or both of the external drives and boot to any of the multiple OS installed on them, or any of the multiple OS installed on their respective internal drives. Still a bit complicated on the boot stanzas, but much better than before.  

Old-Polack: thank you for your illustrative post. It is great to know all the possibilities for running several Distros. I really enjoy learning and experimenting with them. Since I started using Linux in mid 2010 I have not stopped to learn, little by little.

Tonight I will implement with the modified /boot/grub/menu.lst and will post.

[unist]

Assuming that USB drives will appear always in that order, the entry you propose is correct. Go on and try it out
You could also try Old-Polack's advice and have two entries in your menu.lst in case your Knoppix USB drive is seen before the Readyboost one.

Question 1: why do you use FAT32 on the Knoppix disk and not a Linux filesystem (such as ext3 or ext4)?
Question 2: does Readyboost really make any difference in Windows?

agmg:  
Question No. 1: It is a good question for me. I should have formatted the Pendrive in ext4. I simply leaved the FAT32 that it has.

Question No. 2: I really do not appreciate much change in Windows performance, although my system is new and I just used it for a couple of weeks without ReadyBoost, and now, with it installed, I only have 3 weeks. My physical RAM is 8 GB, and the ReadyBoost Pendrive is 4 GB. What I do notice is that Windows seems to use the Pendrive a lot, since the little light of it flashes very often.

Tonight I will do the change in /boot/grub/menu.lst and will post.

[unist]

Done! Perfect!

I added the following stanza to to /boot/grub/menu.list and now I have the new entry in the boot menu for Knoppix 7.04:

title Knoppix 7.04
root (hd3,0)
chainloader +1

I successfully entered in the new OS and I am exploring it.

Thank you agmg, Old-Polack and The Chief.

SOLVED