Patent ID: 7478196
Filing Date: 2009-01-13
Classification: G06F

Abstract:
1. A method comprising: establishing a trap for input/output (I/O) accesses to a Redundant Array of Independent Disks (RAID) system having a plurality of disk devices, wherein trapping parameters for the trap are based upon pre-established trapping parameters associated with a platform including a processor of the platform, the pre-established trapping parameters being associated with a predetermined non-RAID legacy disk drive access operation, the RAID system being presented to an operating system as a single logical disk drive device; determining if the predetermined non-RAID legacy disk drive access operation has been requested, and if so, performing a trapping operation involving the trap, the trap being set as a trap vector in firmware, wherein the trapping operation including commanding a system management interrupt (SMI) based on the I/O access and, based on the SMI, a system management mode (SMM) is enabled in which the firmware processes the predetermined non-RAID legacy disk drive access operation by executing a RAID function associated both with the predetermined non-RAID legacy disk drive access operation and with the trap vector; and during the trapping operation, processing in the firmware as the predetermined non-RAID legacy disk drive access operation the RAID function.