5)All pertinent system tuning parameters are established where known. Note that these may be modified dynamically to improve the performance characteristics of the system.

The following procedures show the sequences necessary to implement a system that initializes itself with a minimum of

information available at power on time. Many real systems are not so INTERFACE generalized, having considerable information available about the

proper configuration at power-on time. In those cases, the sequence steps that would have been necessary to obtain that predefined information may be skipped or ignored.

General Procedure for Initializing Devices

Initiator Activities:

Power On: It is assumed that each SCSI device, as it is powered on, performs appropriate internal reset operations and internal test operations. Once powered on, initiators that have target capability should be prepared to respond to a selection within a system-specific time.

Reset: At power-on time, it is likely that an SCSI device has caused errors to the ongoing activities on the SCSI bus. A bus reset should be generated to notify attached devices that any activities that may have been occurring should be restarted .

Find Device: Each SCSI address other than the initiator’s SCSI address should be tested to determine if an SCSI device responds. If an SCSI device responds, an INQUIRY command to logical unit 0 should be executed. The information obtained indicates the device type, manufacturer, and model of the attached logical unit 0 if the response data format field is one or two. If the response data format field is zero, only the device type field is valid. In addition, the version of command set supported by the device is indicated by the ANSI-approved version field.

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