Drive not readable in XP after crash, fine in DOS

Here's my deal, which is so laden with unlucky coincidences it's kind
of amusing.

My basic setup:
KT7A-RAID (not using RAID though)
Primary: 40 GB Western Digital drive (FAT32, 6 partitions)
Slave: 20 GB Maxtor drive (FAT32, 1 partition)

After a crash today, the D: (Maxtor) isn't recognized under Win XP. I
receive "The disk in Drive D is not formatted. Do you want to format
now?" when I try to access it.

I initially thought it might be an issue with the BIOS (which is
up-to-date) or the VIA chipset (I already have a wacky problem due to
an incompatibility with my generation of Western Digital drives).
However, I was able to boot to DOS (the D: used to be a Win98 system
drive, and I can still get to the command prompt). I found that all of
the folders are still accessible.

Unfortunately, I can't run any utilities to check the disk -- Windows
XP's scandisk doesn't recognize the drive as having a valid file
system. And my floppy drive bit the dust, so I can't use Maxblast,
Norton, etc.

I assume it's a Windows problem at this point. But, due to a low disk
space warning on a partition on my primary drive, I cleared some
"obsolete" files on XP's recommendations. Turns out those obsolete
files were probably my system restore points, because when I looked,
there weren't any! I manually create them on a pretty regular basis,
so there should have been something there.

Any ideas on how to fix this problem, short of reinstalling XP? The
worst part is, I planned on building a new PC in 2-3 weeks anyway,
because I've got to replace half the hardware anyway (plus I'm sick of
the VIA issues and want to switch chipsets).

Thanks in advance for your advice.