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- History_of_IBM_CKD_Controllers abstract "Beginning with its 1964 System/360 announcement IBM's mainframes initially accessed CKD (Count key data) subsystems via a channel connected to separate Storage Control Units (SCUs) with attached Direct Access Storage Devices (DASD), typically a hard disk drive. This practice continued in IBM's larger mainframes thru System/370; however low end systems generally used lower cost integrated attachments where the function of the SCU was combined with that of the channel, typically called an Integrated File Adapter.The System/360 selector channel was followed by the System/370 block multiplexor channel which could operate as a selector channel to allow attachment of legacy subsystems.The SCU evolved into a Director and Controller, the latter typically labelled an \"A-unit\" (or A-Box\") with the controller and at least one DASD physically in an A-unit. An Integrated Storage Control (ISC) is a Director within the cabinet of an IBM System. A Director could attach from one to four A-units. One or more conventional DASD, now labeled a \"B-unit\" could attach to an A-unit The following sections list in order of announcement IBM mainframe CKD storage controls, categorized as conventional storage controls, director type storage controls and integrated controls attaching an A-unit.".
- History_of_IBM_CKD_Controllers wikiPageExternalLink mainframe_profiles.html.
- History_of_IBM_CKD_Controllers wikiPageExternalLink storage_profile.html.
- History_of_IBM_CKD_Controllers wikiPageExternalLink A22-6823-2_System_360_Input_Output_Configurator.pdf.
- History_of_IBM_CKD_Controllers wikiPageID "48481944".
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- History_of_IBM_CKD_Controllers wikiPageRevisionID "704798797".
- History_of_IBM_CKD_Controllers wikiPageWikiLink Cache_(computing).
- History_of_IBM_CKD_Controllers wikiPageWikiLink Category:IBM_mainframe_operating_systems.
- History_of_IBM_CKD_Controllers wikiPageWikiLink Category:IBM_storage_devices.
- History_of_IBM_CKD_Controllers wikiPageWikiLink O.
- History_of_IBM_CKD_Controllers wikiPageWikiLink Controller_(computing).
- History_of_IBM_CKD_Controllers wikiPageWikiLink Direct-access_storage_device.
- History_of_IBM_CKD_Controllers wikiPageWikiLink History_of_IBM_magnetic_disk_drives.
- History_of_IBM_CKD_Controllers wikiPageWikiLink IBM_1130.
- History_of_IBM_CKD_Controllers wikiPageWikiLink IBM_1800_Data_Acquisition_and_Control_System.
- History_of_IBM_CKD_Controllers wikiPageWikiLink IBM_2321_Data_Cell.
- History_of_IBM_CKD_Controllers wikiPageWikiLink IBM_3850.
- History_of_IBM_CKD_Controllers wikiPageWikiLink 360.
- History_of_IBM_CKD_Controllers wikiPageWikiLink 360_architecture.
- History_of_IBM_CKD_Controllers wikiPageWikiLink Microcode.
- History_of_IBM_CKD_Controllers wikiPageWikiLink Paging.
- History_of_IBM_CKD_Controllers wikiPageWikiLink Category:File_System_Management.
- History_of_IBM_CKD_Controllers wikiPageWikiLink Category:IBM_mainframe_hardware.
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "2314 family of storage controls".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "2820 SCU".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "2841 Storage Control Unit".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "3880 director".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "Directors".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "History of IBM CKD Controllers".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "History_of_IBM_CKD_Controllers#2841".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "director type storage control".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "directors".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "integrated attachment of the System 370 Model 25".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "intgratred attachments".
- History_of_IBM_CKD_Controllers wikiPageWikiLinkText "subsystem configurations".
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- History_of_IBM_CKD_Controllers subject Category:IBM_mainframe_operating_systems.
- History_of_IBM_CKD_Controllers subject Category:IBM_storage_devices.
- History_of_IBM_CKD_Controllers subject Category:File_System_Management.
- History_of_IBM_CKD_Controllers subject Category:IBM_mainframe_hardware.
- History_of_IBM_CKD_Controllers comment "Beginning with its 1964 System/360 announcement IBM's mainframes initially accessed CKD (Count key data) subsystems via a channel connected to separate Storage Control Units (SCUs) with attached Direct Access Storage Devices (DASD), typically a hard disk drive.".
- History_of_IBM_CKD_Controllers label "History of IBM CKD Controllers".
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