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OS/VS2 Release 3.8 was the last free release of MVS. In the late seventies and early eighties IBM announced: 5740-XE1 MVS/System Extensions (MVS/SE) MVS/SE improves the performance and RAS of OS/VS2 (MVS) 5740-AM6 Data Facility Device Support (DFDS) for OS/VS1 5740-AM7 Data Facility Device Support (DFDS) for MVS
Operating System/Virtual Storage 1, or OS/VS1, is a discontinued IBM mainframe computer operating system designed to be run on IBM System/370 hardware. It was the successor to the Multiprogramming with a Fixed number of Tasks (MFT) option of System/360 's operating system OS/360 .
IBM released fairly minor enhancements of OS/VS1 until 1983, and in 1984 announced that there would be no more. OS/VS1 and TSS/370 are the only IBM [51] System/370 operating systems that do not have modern descendants. The Special Real Time Operating System (SRTOS), Programming RPQ Z06751, is a variant of OS/VS1 extended to support real-time ...
OS/VS2 (SVS) was a stopgap measure pending the availability of MVS, although IBM provided support and enhancements to SVS long after shipping MVS. SVS provides a single 16MiB address space which is shared by all tasks in the system, regardless of the size of physical memory.
The VS category is divided into two grades; VS1 denotes a higher clarity grade than VS2. Typically the inclusions in VS diamonds are invisible without magnification; however, infrequently some VS2 inclusions may still be visible. An example would be on a large emerald cut diamond which has a small inclusion under the corner of the table. [2]
Logical layout. Each VPLEX engine in a cluster consists of two redundant IO directors and one IO annex, each being a single rack unit (1U) physical device. Each engine has 32 Fibre Channel ports (the VS1 model 16 front-end ports and 16 back-end ports) or 16 Fibre Channel ports (the VS2 model has 8 front-end ports and 8 back-end ports) and is protected by two redundant stand-by power supplies.
System Generation (SysGen) is a two-stage process for installing or updating OS/360, [1] [2] OS/VS1, OS/VS2 (SVS), OS/VS2 (MVS) and chargeable systems derived from them.
Operating System/Virtual Storage 2 (OS/VS2) is the successor operating system to OS/360 MVT in the OS/360 family. SVS refers to OS/VS2 Release 1;