Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Patent
1997-06-30
1999-12-28
Beausoliel, Jr., Robert W.
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
G06F 1100
Patent
active
060095350
ABSTRACT:
The invention relates to a disk drive controller system having redundant operations spread between at least two SCSI adaptors connected to a SCSI bus. At least one host computer is also connected to the SCSI bus. If one of the SCSI adaptors fails, the other SCSI adaptor connected to the bus, upon detecting the failure, takes over for the devices serviced by the failing SCSI adaptor. A special termination connection, in which one SCSI adaptor terminates the SCSI bus while the other SCSI adaptor does not, is provided for implementing the invention. A defined process enables the detecting SCSI adaptor to take over for the failed SCSI adaptor and for the failed SCSI adaptor to thereafter return to normal operation.
REFERENCES:
patent: 5089958 (1992-02-01), Horton et al.
patent: 5450579 (1995-09-01), Johnson
patent: 5720028 (1998-02-01), Matsumoto et al.
patent: 5724501 (1998-03-01), Dewey et al.
patent: 5768623 (1995-09-01), Judd et al.
patent: 5838891 (1996-03-01), Mizuno et al.
Fitzgerald John T.
Halligan Kenneth A.
Ofer Erez
Vishlitsky Natan
Beausoliel, Jr. Robert W.
Elmore Stephen C.
EMC Corporation
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