EMC Qlogic QLA22xx Guia de Instalação descarregar pdf (Página 49)

Symmetrix Fibre Channel with Qlogic HBAs on Linux Hosts

Fabric Configurations

6. In a fabric environment, persistent binding must be enabled.

Without a persistent binding mechanism, the host will be unable

to maintain persistent logical routing of the communication from

a storage device object across the fabric to a Symmetrix 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.

To enable persistent binding for the modular driver, you must

edit /etc/conf.modules. The initiator and target information

necessary for persistent binding are logged in /var/log/messages

when the driver loads. grep the file to obtain the adapter and

target information:

grep scsi-qla /var/log/messages

The output will be similar to the following:

Jan 9 11:24:48 denali kernel: scsi-qla0-adapter-node=0000000000000000;

Jan 9 11:24:48 denali kernel: scsi-qla0-adapter-port=200000e08b009209;

Jan 9 11:24:48 denali kernel: scsi-qla0-target-0=500604800000000c;

The above information is appended to /etc/conf.modules. Use the

ql2xopts parameter to add the persistent binding information to

the file. An example of the /etc/conf.modules configuration file

for a uni-processor system would be:

alias scsi_hostadapter aic7xxx

alias scsi_hostadapter qla2x00

options qla2x00 ql2xopts=scsi-qla0-node=0000000000000000\;scsi-qla0-

adapter-port=200000e08b009209\;scsi-qla0-target-0=500604800000000c\;

When configuring and manually loading the qla2x00(smp) module with

persistent binding information, you must use modprobe rather than

insmod. modprobe is a wrapper that is an extension to insmod. This

utility will load the driver and automatically read the /etc/conf.modules

configuration file.

7. Run the following command to update your

/lib/modules/$1/modules.dep file (where $1 is the kernel version)

with the information you added to /etc/conf.modules:

depmod -a

8. Proceed to Required Kernel Modifications on page 60 to modify and

compile the Linux kernel.

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EMC Qlogic QLA22xx Guia de Instalação Página 49