The present invention is directed to an apparatus and method for detecting and correcting
errors occurring in mirrored processors, which substantially obviates one or more of the …

(57) ABSTRACT A license issuance Server capable of performing a function of Securely
preventing illegalities concerning the granting of licenses to individual machines. In …

US PATENT DOCUMENTS operating system does not respond to the controller failure by
declaring a System failure, however, because the operat 3,544.973 A 12/1970 Borck, Jr. et …

Apparatus and methods for fault-tolerant computing using an asynchronous switching fabric
where at least one of a plurality of redundant data processing elements executing …

SLA including bus interface logic monitoring and reporting activ ity on the bus, isolation
control logic receiving error Signals from error detectors, and isolation Switches through …

57 ABSTRACT A digital data processing device includes a bus for trans mitting signals (eg,
data and/or address information) between plural functional units (eg, a central processing …

US6687851B1 - Method and system for upgrading fault-tolerant systems - Google Patents
US6687851B1 - Method and system for upgrading fault-tolerant systems - Google Patents …

BACKGROUND This invention relates to a computer method and apparatus for transferring
data between a processor section, ie a host processor, and an I/O section, ie one or more …

A state machine in a digital data processor in a UNIX-type operating system environment
has state managers associated with the functional units of the data processor for indicating …

Disclosed is a novel Structure and proceSS for detecting protocol errors on a
communications bus. According to one aspect of the invention, a protocol error detector …