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Symmetrix Fibre Channel with Qlogic HBAs on Linux Hosts
Fabric Configurations
Modular Driver Specifics
1. In order to load the driver automatically at boot time,
/etc/conf.modules must be edited.
vi /etc/conf.modules
Add the appropriate entry:
2. 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.
To enable persistent binding, /etc/conf.modules must be edited.
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 initiator 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. An
example of the /etc/conf.modules configuration file for a
uni-processor system would be:
more /etc/conf.modules
alias scsi_hostadapter aic7xxx
alias scsi_hostadapter qla2x00
options qla2x00 ql2xopts=scsi-qla0-node=0000000000000000\;scsi-qla0-
adapter=200000e08b009209\;scsi-qla0-target-0=500604800000000c\;
System: Enter:
UP
alias scsi_hostadapter qla2x00
SMP
alias scsi_hostadapter qla2x00smp
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