EMC QLogic Guía de instalación descargar pdf (Pagina 50)

Installing and Configuring the QLogic HBA and v8.x-Series Driver

◆ ql2xlbType: defines the load balancing method for the driver. If

set to 0, then all LUNs will be exposed on the first active path. If

set to 1, then the load will be balanced across all active optimized

controller ports.

◆ ql2xexcludemodel: defines HBA models to be excluded from

being marked as available for failover functionality.

◆ recoveryTime: defines the recovery time in seconds required

before commands may be sent to a target device after a failback is

performed.

◆ failbackTime: defines the delay in seconds before a failback is

performed to ensure that all paths are available

Setting the parameter values

The values of the general driver parameters may be modified at the

driver load time. This modification may be performed at the

command line or by adding the parameters to the

/etc/modprobe.conf file on RHEL 4.0 hosts and the

/etc/modprobe.conf.local file on SLES 9 hosts and including

them in the ramdisk.

Note: When attaching to CLARiiON and Symmetrix Storage Arrays, EMC

recommends that the ConfigRequired and ql2xfailover parameters be set to

zero in the /etc/modules.conf file.

◆ To load the QLogic driver onto the system with the parameters at

the command line, use:

modprobe qla2300 ConfigRequired=0 ql2xfailover=0

◆ In order for the modular driver to be loaded at boot time with

these parameters set to 0, a separate options line needs to be

added to the

/etc/modprobe.conf file on RHEL 4.0 hosts and the

/etc/modprobe.conf.local file on SLES 9 hosts.

1. Edit the file appropriate for the distribution being used.

• For Red Hatdistributions, edit:

vi /etc/modprobe.conf

• For SuSE distributions, edit:

vi /etc/modprobe.conf.local

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EMC QLogic Guía de instalación Pagina 50