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A.5 Product Description
A.5.1 Intel i960RS or 80303 (RZ) I/O Processors
These I/O processors are members of a new RISC CPU generation which was specifically
designed for I/O applications. These CPUs can reach a performance of
+100 MIPS and su-
pervise all tasks of the SCSI devices, the RAID controlling and the communication with the
PCI computer. In doing so, they significantly offload the PCI computer, leaving it free to
perform its original tasks.
A.5.2 64 Bit Architecture
To meet the demands on a high performance controller, the bus architecture of the ICP
Controller has a
64 Bit layout.
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64 Bit I/O processor (Intel)
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32 Bit PCI interface with 33MHz for RS Series
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32 Bit PCI interface with 66MHz for RZ Series
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64 Bit PCI interface with 66MHz for RZ Series
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64 Bit memory controller (with ECC)
A.5.3 Cache RAM - Expandable to 256MB
The cache RAM of an ICP Controller consists of one standard unbuffered (nonregistered)
PC133 SO-DIMM/DIMM (as used in most motherboards or notebook computers). The cache
size is flexible as different memory sizes can be obtained by using different modules. Thus,
the memory can be expanded to 32MB, 64MB, 128MB or 256MB.
With RS Series Controllers, the user can install both, a normal or an ECC DIMM. RZ Series
Contrtollers GDT8xy3RZ require an ECC DIMM and GDT4xy3RZ an ECC SO-DIMM. An intel-
ligent multi-level cache algorithm ensures that a high hit rate (cache hit) is achieved. Both,
look-ahead and special delayed-write cache functions are implemented. With the ICP con-
figuration and monitoring utilities ICPCON and ICP RAID Navigator, the user can adjust
various cache parameters.
A.5.4 Compatibility - PCI
The ICP Controllers have been developed in accordance with the 2.2 PCI-Bus specifications.
They perform full bus-master DMA and can be operated in both, 32 Bit and 64 Bit PCI bus
mastering slots. The transfer rates are depending on the Controller type and available PCI
slots and range from 132MB/sec up to 528MB/sec.
ICP Controllers which have a 64 Bit PCI connector can also be operated in 32 Bit slots.
A.5.5 Up to 6 Ultra160 SCSI Channel
The ICP Controllers are available with up to six Ultra160 SCSI channels. Per Channel up to
15 devices can be connected. The maximum data transfer rate is 160MB/sec . per channel.
The channels have a multimode termination and allow cable lengths up to 12 meters. All
termination settings are software-switchable (there are also jumpers for hard settings).
A.5.6 ICP Controller Firmware, BIOS and ICP RAID Console
The firmware, the BIOS of the ICP Controller and the configuration an monitoring program
ICPCON are stored in a Flash-RAM on the ICP Controller PCB. The firmware is designed for
parallel processing and it controls all resources of the ICP Controller. This means that the
entire administration of SCSI devices and RAID is exclusively carried out by the ICP Con-