Browse Prior Art Database

Maintenance Scanner

IP.com Disclosure Number: IPCOM000097720D
Original Publication Date: 1961-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Stringfellow, WR: AUTHOR [+3]

Abstract

When an error due to component failure is detected and corrected in a section of a large data processing system, it is desirable to ascertain the machine condition when the error occurred. This maintenance scanner acts, when manually enabled, to halt operations in a section selected to avoid interruption of other functions. It enables a fast storage of the condition of the section and then releases the section for continued operation. The condition of the section in either case is available to the scanner and is successively scanned by signal groups for transmission to a recording device. The latter produces a record which is analyzed to determine the service needed during the next scheduled down-time.

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Maintenance Scanner

When an error due to component failure is detected and corrected in a section of a large data processing system, it is desirable to ascertain the machine condition when the error occurred. This maintenance scanner acts, when manually enabled, to halt operations in a section selected to avoid interruption of other functions. It enables a fast storage of the condition of the section and then releases the section for continued operation. The condition of the section in either case is available to the scanner and is successively scanned by signal groups for transmission to a recording device. The latter produces a record which is analyzed to determine the service needed during the next scheduled down-time.

The data processor has a number of interconnected sections such as the Input-Output controls 1, the Central Processor 3, a Data Switching Exchange 2 and other sections such as memories, disc files, etc. Each section has related error detecting devices which, upon occurrence of an error, set a latch in a common error register 4 and this, if desired, enables a Scan Control Unit 5 to cause a record to be made of the condition of all settable triggers of the section.

In 1, for example, there are 640 triggers whose condition must be recorded. Since 1 is one of the major data paths, it cannot be interrupted other than momentarily and, therefore, in 1 a group 7 of 640 latches is provided, one for each trigger. When an error condition is to be recorded, control u...