I have looked on the web and it seems if you should not need one if you have any of these OS WIN98/ME/XP look here at this article http://sdd.toshiba.com/main.aspx?Pa...000000E7/810000000C58000000010000659C00002C36.
Has you drive stopped working or you are receiving an error message like no driver blah blah blah? This happened to my wifes Toshiba laptop a few months ago and I could not find the missing driver for love no money, The answer was actually right in front of me SYSTEM RESTORE , restored her computer back a week or two and hey pretso fixed instantly.