The following is a list of common hardware errors that occur in a SAN environment. If you find errors with your hardware, please contact your hardware vendor for specific instructions.
Verify that the SCSI bridge is properly connected to the library and the switch. Apply normal SCSI troubleshooting techniques at the fibre to SCSI bridge. Use a bridge administration tool to verify that the bridge recognizes all of the devices. Also verify that the bridge firmware is up to date.
If some of the servers in the SAN recognize the tape devices, but other servers do not, check for a failed hardware component between the server and the switch. If none of the servers in the SAN recognize the tape devices, check for a failed hardware component between the switch and the tape devices.