Firmware recovery from hanging channels by buffer analysis

Details Firmware recovery from hanging channels by buffer analysis Firmware recovery from hanging channels by buffer analysis

1998-06-30

2000-02-29

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

060322691

ABSTRACT:
This invention provides a software-based method for determining the identity of a failed (hanging) channel in an array of multiple, buffered, synchronized data channels. A hanging channel may stem from a failed storage unit in the channel, a faulty connection within the channel, or a fault in the interface circuitry which connects the channel with the synchronization hardware. It is necessary and useful to identify a hanging channel in order to isolate it (as in a RAID 2-5 system) or for repair. The hanging channel is detected by examination of the byte content of the buffers. If the system is in a read mode, the buffer serving the hanging channel will contain substantially more bytes than the other buffers. If the system is in the write mode, the buffer serving the hanging channel will contain substantially fewer bytes than the other buffers.

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Pankaj Jalote, Fault Tolerance in Distributed Systems, Section 3.3.1 Problem Definition, pp. 100-101. 1994 P T R Prentice Hall.

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