Cannot access data on a slave drive after reinstalling Windows XP on the master

I recently reformatted and reinstalled Windows XP
Professional onto my master harddrive, before doing so I
moved some files that I thought were going to be
necessary on to the slave harddrive. After I reformatted
the master I can no longer access the contents of the
slave. Every time I try to it says, "The disk in drive D
is not formatted do you want to format it now?" Before I
reformatted and reinstalled, the "D" was known as
the "F". Is there any way I can recover the data on
the "D" drive, or do I have to reformat it as well?