Siemens PSFR-CP41 - Manual (Page 34)

Operating Manual U42093-J-Z716-1-74
General SCSI Configuration Understanding the PSFR-CP41 Configuration
General SCSI Configuration
The PSFR-CP41 appears on the SCSI bus as a single initiator. The default
initiator ID is 7, and can be set via configuration to any valid SCSI address. No
other devices on the SCSI bus may use this address.
The PSFR-CP41 provides the capability to reset the SCSI bus during the boot
cycle. This allows the devices on the SCSI bus to be in a known state. Config-
uration allows this feature to be enabled or disabled. This feature is enabled in
the default configuration. Configurations using multiple initiators, changers, or
other devices that have long reset cycles, or are adversely affected by bus
resets, should disable this feature.
The PSFR-CP41 negotiates for the maximum values for transfer rates and data
width on the SCSI bus. If an attached device does not allow the full rates, the
unit will use the rates negotiated for that device. Negotiation is on a device
specific basis, so the unit can support a mix of device types on the same bus.
Fibre Channel Host to SCSI Target Configuration
This section describes the configuration of the PSFR-CP41 when acting as a
target to a Fibre Channel Initiator, passing FCP requests through to SCSI target
devices.
This is configured as the default, using soft addressing on the Fibre Channel
loop and auto addressing for the target device mapping. Auto addressing is
described further in this section.
The PSFR-CP41 automatically detects if it is connected to a loop or a switch,
and will use the appropriate type without further configuration.