Hi Chris,

I had a similar task to solve some time ago, I also used PIPE (same as Quentin) but instead "net ues" I used windows's wmic command: "wmic logicaldisk get name, description" which gave me not only drive letter but also its description.

Code like that:
filename diskinfo PIPE "wmic logicaldisk get name, description";
data _null_;
infile diskinfo;
input;
if index(_INFILE_,":") then put _infile_;
run;