EMC P/N 300-002-803 manual 137

Connecting to the Storage

Configuring persistent binding for the Linux QLogic iSCSI HBA

This section provides the instructions for enabling persistent binding for the Linux QLogic iSCSI HBA v3.x- or v5.x-series drivers.

Note: Future revisions of this driver will not contain the target level binding mechanism that is now present, and the Linux kernel udev() functionality will be used as a per device persistent binding mechanism. This mechanism may be used in lieu of the driver's target level persistent binding mechanism with this driver.

In an iSCSI LAN environment, EMC recommends, but does not require, enabling persistent binding in the driver.

Without a persistent binding mechanism, the host will be unable to maintain a persistent logical routing of communication from a storage devices object across the fabric to an EMC storage array volume. If the physical configuration of the switch is changed (for example, cables are swapped or the host is rebooted), the logical route becomes inconsistent, which could cause possible data corruption.

Note: Please note that the persistent binding mechanism in the QLogic driver is target-based only, not LUN-based.

EMC recommends the usage of the QLogic SANsurferCLIutility, which is text-based, or QLogic SANsurfer, which is GUI-based. SANsurferCLI is included in the installer package and installed by default on the server or may be invoked through the installer package without installing the driver. Both utilities are available from the EMC page on the QLogic website.

What next? Select either the text based or GUI configuration method:

◆For a text-based method of configuring persistent binding using the QLogic SCLI, refer to “Configuring persistent binding using SANsurferCLI” on page 138 or consult the QLogic SANsurferCLI User Guide.

◆For a GUI-based method of configuring persistent binding using the QLogic SCLI, refer to “Unconfiguring persistent binding using SANsurferCLI” on page 140 or consult the QLogic SANsurfer User Guide.

Configuring persistent binding for the Linux QLogic iSCSI HBA

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