DSKSLEEP.FLT - a filter driver to stop your SCSI disks when they haven't been accessed for some time. Timeout selection per disk, IOCtl interface.
For OS/2 2.0 and above. Now with APM support!
http://hobbes.nmsu.edu/pub/incoming/dsksl098.zip
http://hobbes.nmsu.edu/cgi-bin/h-search?key=dsksl098.zip
Source: OS2VOICE