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IBM 4300
The IBM 4300 series are mid-range systems compatible with System/370 that were sold from 1979 through 1992. They featured modest electrical and cooling requirements, and thus did not call for a data center environment. They had a disruptive effect on the market, allowing customers to provide internal IBM computing services at a cost point lower than commercial time-sharing services. All 4300 processors used a 3278-2A, 3279-C or 3205 display console rather than a 3210 or 3215 keyboard/printer console.
Each processor - 4331, 4341, 4361, and 4381 - had various models, later called model groups, e.g., 4341 model 1 (4341-1), 4341 model 2 (4341-2), 4381 model group 1 (4381-MG1).
The 4381-13 through 4381-24 (announced in 1987) were entry-level machines for the 370-XA architecture. They were positioned between the IBM 9370 and IBM 3090 in performance at the time of announcement.
The 4381-MG3, 4381-MG14, 4381-MG24 and 4381-MG92 are dual-CPU models. Other model groups included 1, 2, 11, 12, 13, 21, 22, 23, 90 and 91.
The IBM 4331 (and the 4341) were announced on 30 January 1979. It came with an integrated adapter that permitted attaching up to 16 of two newly introduced direct-access storage devices (DASD):
The 4331 was withdrawn on 18 November 1981.
The IBM 4341 (and the 4331) were announced on 30 January 1979. Like the 4331, it came with an integrated adapter that permitted attaching up to 16 of the newly introduced IBM 3370 DASD. The 4341 did not support the much lower capacity IBM 3310. The 4341 Introduced the Extended Control Program Support:VM (ECPS:VM), Extended Control Program Support:VS1 (ECPS:VS1) and Extended Control Program Support:Virtual Storage Extended (ECPS:VSE) features. The 4341-2 introduced the Extended Control Program Support:MVS (ECPS:MVS) option, a subset of System/370 extended facility.
On 20 October 1982, IBM announced a new entry-level 4341 model, Model Group 9 and a new top-of-the-line 4341, Model Group 12. Model Group 12 included the Dual Address Space (DAS) facility.
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IBM 4300
The IBM 4300 series are mid-range systems compatible with System/370 that were sold from 1979 through 1992. They featured modest electrical and cooling requirements, and thus did not call for a data center environment. They had a disruptive effect on the market, allowing customers to provide internal IBM computing services at a cost point lower than commercial time-sharing services. All 4300 processors used a 3278-2A, 3279-C or 3205 display console rather than a 3210 or 3215 keyboard/printer console.
Each processor - 4331, 4341, 4361, and 4381 - had various models, later called model groups, e.g., 4341 model 1 (4341-1), 4341 model 2 (4341-2), 4381 model group 1 (4381-MG1).
The 4381-13 through 4381-24 (announced in 1987) were entry-level machines for the 370-XA architecture. They were positioned between the IBM 9370 and IBM 3090 in performance at the time of announcement.
The 4381-MG3, 4381-MG14, 4381-MG24 and 4381-MG92 are dual-CPU models. Other model groups included 1, 2, 11, 12, 13, 21, 22, 23, 90 and 91.
The IBM 4331 (and the 4341) were announced on 30 January 1979. It came with an integrated adapter that permitted attaching up to 16 of two newly introduced direct-access storage devices (DASD):
The 4331 was withdrawn on 18 November 1981.
The IBM 4341 (and the 4331) were announced on 30 January 1979. Like the 4331, it came with an integrated adapter that permitted attaching up to 16 of the newly introduced IBM 3370 DASD. The 4341 did not support the much lower capacity IBM 3310. The 4341 Introduced the Extended Control Program Support:VM (ECPS:VM), Extended Control Program Support:VS1 (ECPS:VS1) and Extended Control Program Support:Virtual Storage Extended (ECPS:VSE) features. The 4341-2 introduced the Extended Control Program Support:MVS (ECPS:MVS) option, a subset of System/370 extended facility.
On 20 October 1982, IBM announced a new entry-level 4341 model, Model Group 9 and a new top-of-the-line 4341, Model Group 12. Model Group 12 included the Dual Address Space (DAS) facility.