I don't use dynamic drives on desktops. As to backup, your backup plan comes into play here and you only need to scrape off what files that you didn't from your last backup.
Another workaround is to pull that drive out, put in a new drive, install XP then add the old drive and copy out the files.
This was my setup:
C: Win98, fat32
D: data storage, fat32
E: WinXP, fat32
F: data storage, fat32
Within WinXP, I ended up setting up the F: drive as a dynamic drive -- which, in turn, turned all of my drives into dynamic drives.
Next time I booted, XP gave me a Blue Screen of Death and will not proceed, even in Safe Mode. I've read at microsoft.com that now that these partitions have been converted from "basic" to "dynamic," only WinXP can read them.
My question is this: if I do a setup from the WinXP CD, will I be able to retain the data on my C:, D:, and F: partitions?
At this point I just want to get the system up and running so I can back up the critical files, wipe the hard drive, and start over with just one OS.
P.S. I also have Ubuntu Linux set up on a separate partition, and can boot to that, but not sure if that would "see" the data on the other partitions now that they're "dynamic drives."