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2. MVS - Wikipedia

   en.wikipedia.org/wiki/MVS

   When IBM introduced its 64-bit z/Architecture mainframes in the year 2000, IBM also introduced the 64-bit z/OS operating system, the direct successor to OS/390 and MVS. Fujitsu and Hitachi opted not to license IBM's z/Architecture for their quasi-MVS operating systems and hardware systems, and so MSP and VOS3, while still nominally supported by ...

3. Input/Output Configuration Program - Wikipedia

   en.wikipedia.org/wiki/Input/Output_Configuration...

   Starting with System z9 running z/OS 1.7, IBM offered the multiple-subchannel set facility, which allowed up to four independent sets of 64 Ki subchannels. [3] The installation was responsible for defining the Input/Output Configuration Data Sets (IOCDS's), and the operator could select a specific IOCDS as part of a power on reset (POR).

4. Data Facility Storage Management Subsystem (MVS) - Wikipedia

   en.wikipedia.org/wiki/Data_Facility_Storage...

   More recent releases were corequisites for MVS/ESA SP Version 4 and MVS/ESA SP Version 5. On April 19, 1988, IBM announced [9] the umbrella term Data Facility Storage Management Subsystem for facilities provided by the programs IBM MVS/Data Facility Product (MVS/DFP) Version 3 Release 1.0; IBM Data Facility Data Set Services [c] (DFDSS) Version ...

5. Hierarchical File System (IBM MVS) - Wikipedia

   en.wikipedia.org/wiki/Hierarchical_File_System...

   On April 6, 1994, IBM introduced MVS/ESA System Product (MVS/ESA SP) Version 5 Release 1, [5] which included MVS OpenEdition (MVS-OE) with HFS as a standard component. IBM continued providing HFS through z/OS 2.4 for z System mainframes. IBM functionally stabilized HFS starting with z/OS 1.7, in 2005. [6] The z/OS File System (zFS) was released ...

6. OS/390 - Wikipedia

   en.wikipedia.org/wiki/OS/390

   IBM Communications Server – Provides Virtual Telecommunications Access Method (VTAM) and TCP/IP communications protocols An additional benefit of the OS/390 packaging concept was to improve reliability, availability and serviceability (RAS) for the operating system, as the number of different combinations of elements that a customer could ...

7. Basic direct access method - Wikipedia

   en.wikipedia.org/wiki/Basic_direct_access_method

   Basic Direct Access Method, or BDAM is an access method for IBM's OS/360 and successors computer operating systems on System/360 and later mainframes. BDAM "consists of routines used in retrieving data from, and storing data onto, direct access devices." [1]: p.5 BDAM is available on OS/360, OS/VS2, MVS, z/OS, and related high-end operating ...