I successfully imaged OS revs E0, F0, F1, G0 and H0 of the Pascal Microengine from the original distribution media this morning with the application of cyclomethicone as Chuck suggested. I was worried since they were 79'ish vintage BASF media, but the lubrication did the trick and they read without errors. http://bitsavers.org/bits/WesternDigital/microengine_distributions_E0-H0.zip