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                                                       File Number 8360-07
                                                       Order GA26-3599-6




Systems Reference Library




IBM System/3SD Component Descriptions
2314 Direct Access Storage Facility and
2844 Auxiliary Storage Control

The functional and operating characteristics of IBM 2314
modell, A-series, and B-series Direct Access storage
Facility (DASF) and IBM 2844 Auxiliary storage Control
are described in this manual. These devices provide
high speed, large capacity, direct access storage and
control for IBM System/360 Models 30, 40, 50, 65,
67, 75, 85, 91, and 195 selector channels, or System/
370 selector and block multiplexer channels.
     This manual describes the instruction sets, com-
mand sequences, track formats, and operating procedures
for the above devices.
PREFACE




The purpose of this manual is to provide reference                                   special feature attachment, and component location
material for programmers and operators of IBM                                        are described in the appropriate sections of the
2314 Direct Access storage Facilities. You should                                    manual.
be familiar with IBM System/360 Principles of Oper-                                       Unless specifically noted otherwise, references
ation, Order No. GA22-6821, and the system summary                                   to the 2314 encompass the facility as a whole. That
or functional characteristics manual applicable to                                   is, the control unit and its attached disk storage
the system to which the IBM 2314 is attached. Order                                  modules.
numbers for system summary and functional charac-                                         The IBM 2844 Auxiliary Storage Control (not
teristics manuals can be found in IBM System/360
Bibliography, Order No. GA22-6822.
                                                                                 I   available with the 2314 B-series) performs essen-
                                                                                     tially the same functions as the 2314 control unit.
     Although there are three distinct versions of the                               Therefore, the instruction set, command sequences,
IBM 2314 Direct Access storage Facility (modell, A-                                  etc. described for the 2314 apply to the 2844. Oper-
series, and B-series), the instruction sets, command                                 ating procedures, addressing, and feature attach-
sequences, and operating procedures described in this                                ment peculiar to the 2844 are described in a separate
manual apply to all. All differences in performance,                                 section of this manual.




                                                                                                                                             I
 Seventh Edition (November, 1971)

 This is a reprint of GA26-3599-5, incorporating changes released in Technical
 Newsletters GN26-0265 (dated January 15,1971) and GN26-0274 (dated August 16,1971).

 Significant changes or additions to the specifications contained in this publication
 are continually being made. When using this publication in connection with the
 operation of IBM equipment, check the latest SRL Newsletter for revisions or
 contact the local IBM Branch Office.

 The illustrations in this manual have a code number in the lower corner. This
 is a publishing control number and is not related to the subject matter.

 Copies of this and other IBM publications can be obtained through IBM Branch
 Offices.

 A form for reader's comments is provided at the back of this publication. If the
 form has been removed, send your comments to the address below.

 This manual was prepared by the IBM Systems Development Division, Product
 Publications, Department G24, San Jose, California 95114.




ii    2314/2844 Component Description
                                                                                                                                            CONTENTS




IBM 2314 DIRECT ACCESS STORAGE FACILITY . . . . .                           1      END OF FILE. . . . . . . . . . . . . 

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