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i960 RISC Processor
The processor is a 32-bit Intel i960C RISC microprocessor. The processor controls all
functions of the MegaRAID controller including SCSI bus transfers, PCI bus transfers,
RAID processing, configuration, data striping, error recovery, and drive rebuilding.
Cache Memory
The cache memory subsystem on the MegaRAID controller board has a total of
8 MB of DRAM.
PCI Connector
The PCI connector inserts into the PCI slot of the server system board. This connector
carries all the PCI bus signals between the MegaRAID controller board and the system
board.
Flash EEPROM
Flash EEPROM stores the MegaRAID firmware programs and the configuration data. Since
it is re-writeable, it allows the firmware to be upgraded without replacing any hardware. As
the disk configurations change (for example, when a drive fails) the flash EEPROM records
the changes. The flash EEPROM retains the firmware and configuration data after the
system is powered off.
SCSI Controller
To manage the data flow on the RAID SCSI bus, three 53C770 SCSI controllers are used for
MegaRAID. One SCSI RAID controller is assigned to each channel.
External RAID SCSI Connector
The external RAID SCSI connectors for MegaRAID are 68-pin ultra high density
connectors.
Onboard Speaker
The MegaRAID controller has an onboard tone generator for audible warnings when system
failures occur. The default setting is Disabled.
