1989 Hard Drive Defragger in comp.sys.atari.st (Usenet newsgroup) 7 Sept. I have had no problems yet. But you should backup your HD before using any defragging program.
1989 Defragging a Hard Disk in comp.sys.atari.st (Usenet newsgroup) 27 Sept. With regard to my posting about defragging, here's a caution.
1997 Jan. 33/1 Windows 95 comes with its own perfectly capable defragging program.