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4 | <head><!--#set var="title" value="Univac 9400 disc drives" |
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17 | <meta name="t29.germanoriginal" content="v5.7FINAL" /> |
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26 | |
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27 | <div class="box center auto-bildbreite"> |
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28 | <img src="/shared/photos/rechnertechnik/univac/plattenlaufwerke.jpg" alt="Die Plattenlaufwerke" width="595" height="446" /> |
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29 | <div class="bildtext"> |
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30 | <p> |
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31 | Disc drives have a much smaller access time compared to |
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32 | tape drives. On the other side, the controlling of the drive |
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33 | and the 10 heads is very complex, so they needed a whole |
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34 | cabinet with electronics (in the photo only particulary mapped). |
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35 | <br />The storage capacity of the original 8414 series |
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36 | is 7.5MB per disc pack. Our drives (1970s, 8425 series) can |
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37 | already store 50MB. For that time, this was an incredible size. |
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38 | <br />We have currently connected three drives, as you can see |
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39 | in the picture. |
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40 | </p> |
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41 | </div> |
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42 | </div> |
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43 | |
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44 | <div class="box center auto-bildbreite"> |
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45 | <img src="/shared/photos/rechnertechnik/univac/diskkoepfe.jpg" alt="Disc heads" width="595" height="511" /> |
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46 | <div class="bildtext"> |
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47 | <p>The disc heads are amazingly big. The moving coil (on the left hand) |
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48 | plunges into an heavy pot magnet (not visible in the picture) and |
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49 | thus moves the complete slide on it's position. |
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50 | <br/>Therefore it works just as an ordinary loudspeaker, but the moving |
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51 | masses are much higher. The predecessor still moved the sled pneumatically. |
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52 | <br/>There is a bottle of wine in the right hand of the picture for |
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53 | comparison. |
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