Data gateway port settings
A data gateway in a SAN translates fibre channel to SCSI for SCSI devices attached to the gateway.
Data gateways are popular in SANs because they allow the use of SCSI devices, therefore it is important that the port settings for a data gateway are correct.
The vendor for the data gateway
usually provides information about the appropriate settings and configuration
based upon the SAN topology being deployed and SCSI devices used.
Similarly, the vendor might provide a utility and other instructions
on how to configure it. The following settings can be used for the
fibre channel port mode on the connected port on a data gateway:
- Private target
- Only the SCSI devices attached to the data gateway are visible and usable from this port. For the available SCSI devices, the gateway simply passes the frames to a given target device. Private target port settings are typically used for arbitrated loops.
- Private target and initiator
- Only the SCSI devices attached to the data gateway are visible and usable from this port. For the available SCSI devices, the gateway simply passes the frames to a given target device. As an initiator, this data gateway might also initiate and manage data movement operations. Specifically, there are extended SCSI commands that allow for vendor-acquired data movement. By setting a given port as an initiator, it is eligible to be used for vendor-acquired data movement SCSI requests.
- Public target
- All SCSI devices attached to the data gateway, as well as other devices available from the fabric, are visible and usable from this port.
- Public target and initiator
- All SCSI devices attached to the data gateway as well as other devices available from the fabric are visible and usable from this port. As an initiator, this data gateway might also initiate and manage data movement operations. Specifically, there are extended SCSI commands that allow for vendor-acquired data movement. By setting a given port as an initiator, it is eligible to be used for vendor-acquired data movement SCSI requests.