Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2011-02-01
2011-02-01
McCarthy, Christopher S (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S015000, C714S045000
Reexamination Certificate
active
07882393
ABSTRACT:
A mechanism for in-band problem log data collection is provided. Facilities are provided for a host system, host application, or server system to instigate a state save operation in a storage system utilizing direct commands in response to an error or failure. The host system may include an application program interface (API) to force the storage device to collect a set of state save data for debug purposes at a specific time interlocked with a host system log. The API of the illustrative embodiments may be provided in a failover driver and/or host bus adapter (HBA) driver in the prime code path such that first time data capture following an error is maximized. Since the host system is instigating the state save operation with direct commands, a larger amount of transient data may be collected to provide more comprehensive state information for debugging purposes.
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Grimes Andrew W.
Khandelwal Nikhil
Bluestone Randall J.
International Business Machines - Corporation
McCarthy Christopher S
Tkacs Stephen R.
Walder, Jr. Stephen J.
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