Thanks John, that's just what I figured re the partition. Here's what happened:
My OptiPlex 330 is a warranty replacement for a GX620 that was very buggy. But I swapped the hard disks into the replacement in order to avoid the chore of restoring :( Two weeks ago, disk 1 (the boot disk) failed. Dell sent out a new one of the same kind: WD Raptor 80G. I had SPD 3.1 backups that included the * partition, so I restored the disk. When it tried to boot, I got an error message that the computer wasn't recognized as a Dell. During the restore process I noticed that the file size of the SPD backup of * was 63MB, whereas everywhere else the * partition shows up as 7.8MB.
2d try: I used the Dell OS CD that came with the replacement 330 to wipe out all partitions from the 1st try and reformatted the entire disk. Then I installed Win XP Pro from the Dell CD...which also installed the * partition. After Windows was installed, I rebooted to the SPD recovery CD and used the environment to reformat the C partition, then I restored C (and also D, which had some program files); all seemed to go fine. When I rebooted to the hard disk, I got a boot menu offering a choice of "Windows XP" or "Windows XP Professional"...which seemed odd, since my reformat/restore should have obliterated all traces of the Win version from the Dell CD. When I guessed right as to which one corresponded to my restoration, the machine did boot like before the problem. But I didn't like having a phantom Windows and a boot menu.
In the end I would up back with a reinstall of Win from the Dell CD, after which I reinstalled my programs manually. (I wanted to reconfigure aspects of my system and I had the time available, so this wasn't so bad.) My problem is that if the HD fails again, I want to be able to restore it just by firing up the SPD recovery CD, without all the hassle I described. I figure there must be a right way.
On my 330, SPD 3.2 doesn't even know my * partition exists. On my wife's, SPD 3.1 does see the * partition and offers it as a choice for backup and restore, but the backup fails with an error message that the partition couldn't be read. (The * partition is formatted FAT32, but I can't imagine that could cause the problem.) Am I missing something here? I don't think I have all the backups I need for either machine....
David