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PCI Bus Interface
The RAID controller interfaces to its host system through the PCI bus. The PCI bus allows
32-bit high speed transfers and supports a burst data rate of over 130 MB per second.
AT Compatible BIOS
The RAID controller has an Advanced Technology (AT) compatible BIOS containing a set
of special programs which receive control of the system when it is first powered on. The
RAID controller then intercepts all INT13 BIOS calls and translates them into the
appropriate RAID control codes.
RAID Controller Firmware
The RAID controller firmware programs, stored on the flash EEPROM, are executed by the
i960 RISC processor. The flash EEPROM allows the system firmware to be upgraded
without replacing any hardware.
NOTE
If the firmware becomes lost, contact the Customer Response Center for assistance. Only
qualified service personnel should update the firmware.
RAID SCSI Bus
The RAID SCSI bus connects the disk drives and internal devices to the RAID controller.
The DAC960P and the DAC960PD are Fast Wide SCSI-2. The MegaRAID controller is
Ultra-wide SCSI.
Components
The RAID controller uses the following components:
i960 RISC Processor
The processor is a 32-bit Intel i960C RISC microprocessor. The processor controls all
functions of the RAID controller including SCSI bus transfers, PCI bus transfers, RAID
processing, configuration, data striping, error recovery, and drive rebuilding.
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