For some mysterious reason, I cannot upgrade my old Jaunty system to the newest LTS, or even 10.04.4 LTS.

I'm doing this on an older box with an Adaptec 29160 SCSI card. The SCSI card is in slot 3 of the motherboard. There are two devices terminated or chained on the SCSI interface: the HDD is device #0, and the CD-ROM drive is device #3.

I thought this would be easy, as the CD-ROM drive is in good working order.

I can't upgrade the system over the network anymore via apt-get or Update Manager, because Jaunty is no longer supported

1. I burn the Ubuntu 10.04.4 LTS iso. On startup, I enter the system BIOS and change the boot order so that the CD-ROM boots first, then restart. I get an error during post: "DISK BOOT FAILURE. INSERT SYSTEM DISK AND PRESS ENTER." But the disk is already in the drive, and when I press "Enter", I get a blank screen with a blinking cursor in the upper left hand corner of the screen.

2. I wonder if I can change the boot order in the SCSI BIOS. So I reboot and press CTRL-A to access the SCSI BIOS, and change the first device in the boot order from "0" to "3" (the device number for the CD-ROM drive). Restart, but the disk doesn't spin up and I get the same error, "DISK BOOT FAILURE. INSERT SYSTEM DISK AND PRESS ENTER."

I'm at my wit's end. I thought this would be simple, and I know the drive works because I installed Jaunty via CD.

What am I doing wrong?