Service Manuals, User Guides, Schematic Diagrams or docs for : IBM 360 training C20-1649-3_DASD_studentText

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C20-1649-3_DASD_studentText


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Student Text

Introduction to IBM System/360

Direct Access Storage Devices

and Organization Methods
Preface




This text discusses the physical characteristics and
capacities of the following Direct Access Storage De-
                                                                     "
vices available for System/360 Models 25, 30, 44, 50,
65, 67, 75, and 85:
      2301 Drum Storage
      2302 Disk Storage
      2303 Drum Storage
      2311 Disk Storage Drive
      2314 Direct Access Storage Facility
      2321 Data Cell Drive
The file organization methods and access methods pro-
vided for these devices by the IBM System/360 Op-
erating System, the IBM System/360 Disk Operating
System, and the IBM System/360 Basic Operating
System are also discussed. The uses of direct access
storage, basic terminology, and the establishment of
controls for a direct access system are other topics
addressed by this text. Most of the chapters end with
student exercises, answers to which may be found
 at the end of the manual.
    No attempt at completeness is made. Refer to the
publications listed in the Bibliography for additional
 details.



MAJOR REVISION (April 1969)
  This edition, C20-1649-3, is a major revision of, and obsoletes,
the previous edition, C20-1649-2. The significant changes in
this edition are designated in three ways:
1. A vertical line appears at the left of affected text where only
    part of a page is changed.
2. A dot (.) appears at the left or right of the page number
    where a complete page should be reviewed.
3. A dot (.) appears at the left of the title of each figure that
    has been changed.




 Requests for copies of IBM publications should be made to
 your IBM representative or to the IBM branch office serving
 your locality.


A form is provided at the back of this publication for readers'
comments. If the .form has been removed, comments may be
addressed to IBM, DP Education Development, Education
Center, Endicott, New York 13760.



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