HP XP10000, XP128 manual Scsi TID map for Fibre Channel adapters

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SCSI TID map for Fibre Channel adapters

When an arbitrated loop (AL) is established or reestablished, the port addresses are assigned automatically to prevent duplicate TIDs. With the SCSI over Fibre Channel protocol (FCP), there is no longer a need for target IDs in the traditional sense.

SCSI is a bus-oriented protocol requiring each device to have a unique address since all commands go to all devices. For Fibre Channel, the AL-PA is used instead of the TID to direct packets to the desired destination.

Unlike traditional SCSI, when control of the loop is acquired, a point-to-point connection is established from initiator to target. To enable transparent use of FCP, the operating system maps a TID to each AL-PA.

The host maps SCSI protocol to Fibre Channel protocol and detects and accesses Fibre Channel-connected devices using device files (/dev/dsk/c*t*d* and /dev/rdsk/c*t*d*) in the same way as for SCSI-connected devices. The device files for Fibre Channel-connected devices are configured in a different way from SCSI-connected devices, because Fibre Channel supports 126 addresses per path while SCSI supports 16 TIDs per path.

The following table identifies the fixed mappings between the TID (drive) values assigned by the operating system and the Fibre Channel native addresses (AL_PA/SEL_ID) for Fibre Channel adapters. The controller number (the dks value in /dev/dsk/dks*d*l*s*) depends on the server configuration, and a different value is assigned per each column.

Disk array device emulations

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Contents Sixth edition July Part number A5951-96015 XP128 XP1024 XP10000 XP12000Sixth edition July 2005 part number A5951-96015 Contents Troubleshooting Intended audience About this guidePrerequisites Disk arraysHP storage website Related documentationHP sales and authorized resellers Contact HPHP technical support Bold Document conventionsRevision history That USE of the Software is AT Your Sole RISK. HP Warranty statementAbout this guide Page Installation Features and requirements Fibre Channel interface Failover Device emulation typesRAID Manager command devices Snmp configurationInstallation procedures Setting the host mode for the disk array ports Install and configure the disk arrayPage Mode Level Description and Usage Software Setting the System Option ModesFibre Address Configuring the Fibre Channel portsFabric and Connection parameter settings Install and configure the host Installing and configuring the HBAsLoading the OS and software Clustering and fabric zoning SAN Defining the paths Connect the disk arrayPage Example Verifying HBA installationTo verify device recognition Verifying device recognitionCxtydz where Page Configure disk array devices Verifying the device files and drivers Claimed Busnexus Creating the device files # lsdev Character Block Driver Class 188 Sdisk Disk Example of a completed device data table To create the physical volumes Creating the physical volumesTo create volume groups Creating new volume groups# mknod /dev/vg06/group c 64 Vgda To create logical volumes Creating logical volumesLvremove LvextendOPEN-L = To create file systems Creating the file systemsRepeat for each logical volume on the disk array To change the I/O timeout parameter Setting the I/O timeout parameterCreating the mount directories To create a mount directory for each logical volumeTo mount and verify the file systems Mounting and verifying the file systemsTo set up and verify the auto-mount parameters Setting and verifying the auto-mount parametersParameter Name Enter Page Troubleshooting Error conditions Pvcreate for example, /dev/rdsk With vgcreateNewfs for example, /dev/vg01/r/vo/x Host hangs or devices are Contact Information Calling the HP support centerPage Worksheets Path worksheet Disk array device emulations Supported emulations Luse Device type specificationsPage Disk array device emulations MPE Luse device parametersPhysical Max Extent Extent size Device type Size PE OPEN-8/9/E-CVS Scsi TID map for Fibre Channel adapters Value Reference information for SAM Configuring the devices using SAM Reference information for SAM To change the maximum number of volume groups Setting the maximum number of volume groups using SAMCommand View XP Command ViewCommand device Array groupDisk controller unit Host modeDisk cabinet unit Emulation modes FailoverPath OPEN-xPort Remote console PCRemote Control RC VolumeRemote Web Console Index Page Index