Xsan uses Fibre Channel connections to:
Transfer user data between clients and data storage pools
Transfer metadata between metadata controllers and metadata storage pools. If you have connections operating below the data rate supported by your equipment (typically, 2 or 4 Gb/s), verify Fibre Channel performance and troubleshoot the fabric.
Because the devices connected to a Fibre Channel network adjust their speed to match the slowest device on the fabric, be sure that all connections in the fabric are operating at the expected speed (typically, 2 or 4 Gb/s).
Check with the manufacturers of the devices you’re connecting to your fabric to be sure that the transceivers (GBICs) you’re using are qualified for use with their devices.
Use the management software provided with your Fibre Channel switches to test the performance of your Fibre Channel fabric.