You are trying to upgrade an existing 1Gb/s FC SAN that is using 62.5 micron multi-mode cable from a tape library to a server that is 175 meters away to 2Gb/s Fibre Channel. After switching to the 2Gb

The connector type (LC vs. SC) does not inherently dictate Fibre Channel speed, and while LC is common for higher speeds, SC connectors can still be used with 2Gb/s FC equipment within supported cable parameters.

While 50 micron multi-mode cable (OM2/OM3/OM4) supports longer distances at higher Fibre Channel speeds, the immediate cause of the errors with the existing 62.5 micron cable is exceeding its specific distance limitation for 2Gb/s, not a requirement to switch cable types.

An optical splitter is used for functions like monitoring or splitting a single optical signal to multiple receivers, not for extending the maximum distance capability of a fiber optic cable in a point-to-point Fibre Channel link.

For 2Gb/s Fibre Channel, 62.5 micron multi-mode fiber (OM1) has a maximum supported distance of approximately 150 meters. A 175-meter cable run exceeds this specification, causing signal degradation and errors that prevent a stable connection.