HP StorageWorks 2/140 fw 04.01.02 and sw 06.03.01 director release notes - Page 8

Cable Requirements least two ISLs should connect any two director-class fabric elements. Because this number is subject to change, contact your HP authorized service representative for the current number of ISLs supported per director. ■ Hop Count-The fibre channel theoretical limit of ISL connections traversed (hop count) in a single path through a fabric is 7. The maximum supported hop count in a single path through a fabric is 3. Because this number is subject to change, contact your HP authorized service representative for the current hop count supported by a single fabric path. Note: The hop count is equal to the number of ISL connections traversed in a single path, not the total number of ISL connections between devices. Cable Requirements Note: Please note that optical cables for the Director 2/64 and Director 2/140 must be ordered separately. For cables measuring up to 500 meters (1 Gbps) or 300 meters (2 Gbps), use multi-mode Fibre Channel cables. For longer cables, use single-mode Fibre Channel cables. Multi-mode optical cables are connected to short-wave optical transceiver modules in a switch. Single-mode optical cables are connected to long-wave optical transceiver modules in a switch. Multi-mode cables should use 50/125 optical fibers, and single-mode cables typically use 9/125 optical fibers for distances up to 10 km. Verify that connectors interfacing with the Director 2/64 and Director 2/140 use LC Duplex connectors with a PC finish. In addition, the connector at the opposite end of the cable must use either LC or SC type, depending on the requirements of the connected device. 8 Director Release Notes