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Data loss can occur during RAID operations that involve certain system memory locations when the RAID controller’s internal memory controller incorrectly responds to the RAID controller’s I/O Processor (IOP) request to access these host memory locations. Please reference the “Bus Interface Unit (BIU) Claims DAC addresses in the range of the memory mapped registers (MMR)” errata in the April 2005 Intel® I/O Processor Specification Update for the Intel® I/O
The issue is that a data error can occur when the RAID Controller is installed in a system with larger than 4GB of system memory. This issue is manifested when the RAID Controller memory registers respond to a RAID controller IOP request to do a DMA access to or from the affected system memory locations, causing the data to be in contention between system memory and the RAID controller’s internal memory registers. As these registers are critical to normal operations, data loss may occur. (Firmware 514I)
Please refer to TA-769-2 for more details.
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