Simtel MSDOS Archive CDROM, March 1997.  Walnut Creek CDROM.
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 Microsoft product support
 path: \disc2\microsft 
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ga0363.zip   Microsoft diagnostics utility MSD, vers. 2.00
pd0646.zip   Updated CHKDSK.EXE & UNDELETE.EXE for DOS 5.0
pd0805.zip   Microsoft update: SMARTDRIVE v4.2 for DOS 6.0
ww0530.zip   MS Appl Note: SMARTDrive & 32-bit disk access