Qualstar 501440 Rev. G operation manual Configuring the Fibre Channel Scsi Devices Interface

The Id Mode menu item has two selections, FIXED or SOFT. If the mode is FIXED, the Loop Id entry is displayed. If the Id Mode is SOFT, the Loop ID is automati- cally assigned by the FCO.

During the Fibre Channel Arbitrated Loop (FC-AL) initialization process, a unique Arbitrated Loop Physical Address (AL_PA) value is assigned to each port on the loop. Not all of the 256 hex values are allowed as AL_PA values per FC-AL. The Loop Id value is used to represent the 126 addresses that the FCO can use. Table 7-1shows how a Loop Id value maps to an AL_PA. If the Id Mode is “SOFT”, the FCO will at- tempt to obtain an available Loop Id, in the following order: 0, 1, 2, etc.

5.8Configuring the Fibre Channel SCSI Devices Interface

To establish the SCSI device configuration the Fibre Channel Option is commanded to “Rescan” its six SCSI device buses. The six SCSI device channels, starting with Chan- nel 0, begin scanning for SCSI devices using ascending SCSI Target Ids. After all six channels have been scanned, the FCO builds a SCSI device table, that it uses to map SCSI Targets to the host as logical devices (LUNs).

Press the V (UP) or W (DOWN) key to move the pointer to Device. Press the EN- TER key to enter the Configuration\Fibre Channel\Device menu.

The Configuration\Fibre Channel\Device menu panels display a list of SCSI devices attached to the Fibre Channel Option. A TLS library with a single Fibre Channel Option displays the title CFC···········Device.

CFC•••••••••••Device

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RESCAN

The Fibre Channel Option assembles a list of SCSI devices it detects on its six SCSI channels. This menu displays the SCSI devices that a Fibre Channel Option has de- tected. To initiate the scan operation, press the W (DOWN) key to move the pointer to RESCAN and press the ENTER key. The RESCAN item will disappear and return when the operation completes.

5-12 FCO Type B Installation 501440 Rev. G