Method and circuit for data integrity verification during DASD d

Details Method and circuit for data integrity verification during DASD d Method and circuit for data integrity verification during DASD d

1997-09-25

2000-03-14

Beausoliel, Jr., Robert W.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

711112, G06F 1100

Patent

active

060386762

ABSTRACT:
System and method aspects for avoiding data corruption during data transfer in a disk array environment are described. In a circuit aspect, an integrity checker includes counting logic for counting fields in the data being transferred. The integrity checker further includes comparison logic for comparing a constant value and a value in a predetermined field of data being transferred. Combinational logic is further included and coupled to the comparison logic and counting logic, wherein when the comparison logic results in a miscompare and the counting logic is at a predetermined count value, the integrity checker circuit aborts data transfer. In a method aspect, the method includes providing an integrity checker at an interface to an array of disk drives, and performing data validity determinations on data passing across the interface with the integrity checker, wherein invalid data is not transferred.

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