ISA Cache Configuration

Hi all,
 
Just wondering if anyone knew how to recover an ISA server that has "forgotten" 
about C: drive with respect to available drives to hold a cache on.
 
I did have my server configured for a 2nd spindle, however its died, and I'm 
wanting to put the cache on the C: drive as an interim measure.  The drive *is* 
NTFS, however not visible in the cache configurator.  Any ideas?
 
Thanks,
 
Anthony.

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