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AIX Version 4.3 Differences Guide

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1.6 Gigabit Fibre Channel Adapter<br />

<strong>AIX</strong> <strong>4.3</strong>.2 supports the new Gigabit PCI adapter for Fibre Channel Arbitrated<br />

Loop (FC-AL) connectivity on RS 6000 S70/S7A machines. The adapter has an<br />

expected availability date of March 26, 1999. It uses a shortwave over optical<br />

fibre cable for a distance of up to 500 meters. With the use of optical fiber cabling,<br />

this adapter allows users to establish a high speed network for local and remote<br />

storage.<br />

Fibre Channel Arbitrated Loop (FC-AL) began as the Fiber Channel Standard<br />

(FCS) originally developed by IBM as a communications technology for computer<br />

systems. FC-AL provides a high-speed interconnect running at 100 MB/s for a<br />

single loop, 200 MB/s for dual loop-theoretical.<br />

FC-AL is an arbitrated loop technology that allows only one-device access to the<br />

bus for I/O operations.<br />

This adapter is supported on <strong>AIX</strong> <strong>4.3</strong> with APAR IX81852.<br />

This adapter has the following characteristics:<br />

• One initiator capability over an optical fiber link, one Gigabit Fibre Channel<br />

Adapter per loop<br />

• Transmitting distance at 500 meters when using 50/125 micron cable and 175<br />

meters when using 62.5/125 micron cable<br />

• Data rate throughput at 100 MB/s burst, 75 MB/s sustained<br />

• 25 MHz to 33 MHz clock speeds<br />

• 132 MB/s peak data transfer rate<br />

• 32-bit PCI Bus Master Mode DMA, 32 bit PCI Bus Slave Mode interface<br />

• Slave Mode supports medium device select timing<br />

• 32-bit PCI adapter with 64-bit addressing capability<br />

• Transmitting rate of 1062.5 MB/s<br />

• Short PCI form factor (6.875 x 4.2 inches)<br />

• Bus master, scatter/gather architecture<br />

• Selectable big/little endian<br />

• GLM medium adapter allows future use of copper or longwave optics<br />

• Supports 2048 exchanges<br />

• 6 KBx36 frame buffer (4 KB receive, 2 KB transmit)<br />

• 128 KBx32 SSRAM for processor memory<br />

• 512 KB Flash EPROM that contains microcode<br />

• 233 MHz ARM processor as the adapter controller<br />

• Support for 5.0 Volt or 3.3 Volt electrical signaling<br />

• Estimated performance is 5000 to 9000 SCSI 4 KB OP/s<br />

• PCI Local Bus Revision 2.1 compliant<br />

• No IPL/Boot support<br />

10 <strong>AIX</strong> <strong>Version</strong> <strong>4.3</strong> <strong>Differences</strong> <strong>Guide</strong>

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