by Joe of E.B.F.
This is a general article about the quality of 3,5"-disks. To the facts: The US-firm Memory Control Technology Corp. (Memcom) published the results of a test concerning the quality of 3,5"-disks. The main result was: Most of the disks do not reach the ANSI-norms (US-institute of industrial norms, comparable with the german DIN). Memcom (Omaha/Nebraska) produces copy-machines and copies software for big firms. Memcom copies an average of half a million disks per months (250000 of that are 3,5").
Memcom had an increasing error-rate, so they decided to test disks of 25 producers. So they bought 100 disks from each firm. They tested all disks with several mechanical & electronical methods. Memcom tested the stability and the mechanics/mechanism, the ability to label them, of course the data-security, maximum - capacity - all in a permanent "stress" situation of the disks. The tests refered to the last ANSI-norm. The results were horrible: One of hundred disks contained an error. Only disks of IBM, KAO, TDK, Memorex and C.Itoh could stand up to the ANSI-norms. All others of the 25, had an above-average failing-quote. Disks from Verbatim, Sony, Syncom, Polaroid, Maxell and Fuji got the second place in this high-score-list. SKC, Wabash, Xidex and Dysan were the worst of the test. The consequences for Memcon: they will working in the future first and foremost with TDK-disks. In 1987, when Memcom tested 5,25"-disks the results were similar. That time BASF was best. But the producers took it as an inspiration and improved the quality of the 5,25" disks. I hope that the same will happen with the 3,5"-disk.
Now to YOU, readers of this mag: Write down your experiences with 3,5" disks and send them us. Here an example of a possible opinion: "The 3,5" disks of firm XYZ are full of errors / 100% error-free / two of a ten-disk-package were damaged...". If there are enough sendings from you, the result will be published! - CHESTER/BRS (Thanks to Joe for this idea)
This article originally appeared in the Amiga diskmagazine "Zine #5" by Brainstorm 1990.
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