DescriptionName

DescriptionName = [File | EA]:  Sets the file name in which to store file 
descriptions.  The default file name is DESCRIPT.ION.  Use this directive 
with caution because changing the name from the default will make it 
difficult to transfer file descriptions to another system. 

If you set DescriptionName = EA, CMD.EXE will use the ".SUBJECT" extended 
attribute (EA) for file descriptions instead of a separate file.  Note 
that using EAs will slow the DIR and SELECT commands noticeably.  On a FAT 
volume, performance may be substantially slower, depending on whether the 
system has cached the extended attributes. 

Also see SETDOS /D.