Difference between revisions of "VAXft series"

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The '''VAXft series''' ('''VAX fault tolerant''') were a series of [[fault tolerant]] [[VAX]] computers produced by [[Digital Equipment Corporation|DEC]]. They used [[redundancy]] to produce reliable operation.
 
The '''VAXft series''' ('''VAX fault tolerant''') were a series of [[fault tolerant]] [[VAX]] computers produced by [[Digital Equipment Corporation|DEC]]. They used [[redundancy]] to produce reliable operation.
  
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Units contained dual [[Central Processing Unit|CPUs]] and other components, mounted in separate [[backplane]]s in the [[cabinet]] (the complete set, which formed a functional computer, being denominated as a 'zone'), with a 'crosslink cable' running between the CPUs. The cable allowed [[hardware]] in the two CPUs to check, on an [[instruction]]-by-instruction basis, that they were producing identical results.
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Units contained dual [[Central Processing Unit|CPUs]] and other components, mounted in separate [[backplane]]s in the [[cabinet]] (each complete set, which formed a functional computer, being denominated as a 'zone'), with a 'crosslink cable' running between the CPUs. The cable allowed [[hardware]] in the two CPUs to check, on an [[instruction]]-by-instruction basis, that they were producing identical results.
  
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In addition to the CPU card, and at least one [[main memory]] card, each zone had at least one [[KFE52]] system I/O controller module; the KFE52 provided a [[Digital Storage Systems Interconnect|DSSI]] [[mass storage]] [[bus]], an [[Ethernet]] interface, and two [[asynchronous serial line]] interfaces. (An MI bus connects the CPU to the KFE52(s).)
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In addition to the CPU card, and at least one [[main memory]] card, each zone had at least one [[KFE52]] system I/O controller; the KFE52 provided a [[Digital Storage Systems Interconnect|DSSI]] [[mass storage]] [[bus]], an [[Ethernet]] interface, and two [[asynchronous serial line]] interfaces. (An MI bus connects the CPU to the KFE52(s).)
  
 
Some of the VAXft's fault tolerance features are implemented in [[software]], the [[VAXft System Services]] software, which is needed to support those features.
 
Some of the VAXft's fault tolerance features are implemented in [[software]], the [[VAXft System Services]] software, which is needed to support those features.

Revision as of 03:10, 9 May 2024

The VAXft series (VAX fault tolerant) were a series of fault tolerant VAX computers produced by DEC. They used redundancy to produce reliable operation.

Units contained dual CPUs and other components, mounted in separate backplanes in the cabinet (each complete set, which formed a functional computer, being denominated as a 'zone'), with a 'crosslink cable' running between the CPUs. The cable allowed hardware in the two CPUs to check, on an instruction-by-instruction basis, that they were producing identical results.

In addition to the CPU card, and at least one main memory card, each zone had at least one KFE52 system I/O controller; the KFE52 provided a DSSI mass storage bus, an Ethernet interface, and two asynchronous serial line interfaces. (An MI bus connects the CPU to the KFE52(s).)

Some of the VAXft's fault tolerance features are implemented in software, the VAXft System Services software, which is needed to support those features.

VAXft models included:

Further reading

External links

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