IN-BAND PROBLEM LOG DATA COLLECTION BETWEEN A HOST AND A STORAGE SYSTEM

摘要

A systemand method for in-band problemlog data collection are 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 witha host systemlog. 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 oftransient data may be collected to provide more comprehensive state information for debugging purposes.