EMC Qlogic QLA22xx Installationsanleitung PDF herunterladen (Seite 59)

Symmetrix Fibre Channel with Qlogic HBAs on Linux Hosts

Fabric Configurations

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.

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

compile the Linux kernel.

Static Driver Specifics

1. In a fabric environment, persistent binding must be enabled in the

driver. Without a persistent binding mechanism, the host will be

unable 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.

If the qla2x00(smp) driver is built statically into the kernel, the

persistent binding information must be added to /etc/lilo.conf

rather than /etc/conf.modules. To obtain the initiator and target

information, grep the /var/log/messages file as indicated

previously for the modular driver:

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-node=200000e08b009209;

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

Append the obtained information to /etc/lilo.conf using the

ql2xopts parameter to add the persistent binding information to

the file.

For example, /etc/lilo.conf would contain an entry similar to the

following:

append = "ql2xopts = scsi-qla0-adapter-node=0000000000000000;

scsi-qla0-adapter-port=200000e08b009209;

scsi-qla0-target-0=500604800000000c;"

Ensure that mkinitrd /boot/initrd-$1.img $1 and lilo are invoked

when compiling the kernel in order for the driver to be loaded

correctly as static.

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EMC Qlogic QLA22xx Installationsanleitung Seite 59