Dell Emulex Family of Adapters - Manual (Page 1033)

Emulex Drivers Version 10.2 for VMware ESXi User Manual P010087-01A Rev. A
3. Configuration
iSCSI Driver Configuration
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9. Click Close.
10. A dialog box indicates that a rescan is needed. Click Yes.
The configured LUNs are displayed.
11. Repeat the steps to log into the other target portal to set up MPIO.
12. To check that both paths are connected to the same LUN, follow these steps:
a. Select the LUN and right-click.
b. Click Manage Paths. Multipaths on the LUN are displayed.
Error Handling Under Multipath (MPIO) and Cluster
Configurations
In an MPIO or cluster configuration, fault tolerant software is present on the system
that makes the iSCSI driver error handling redundant. These configurations also
require that I/O errors be reported as soon as they are detected, so the software can
failover to an alternate path or an alternative node as quickly as possible.
When the iSCSI driver is run under these configurations, the error handling
implemented in the iSCSI driver must be turned off by setting the default value of
LDTO and ETO to 0. The changes will take effect during the next driver load.
Reading the Driver Statistics for a Specified Port
You can read the iSCSI driver’s statistics for a specific port on the adapter to diagnose
potential performance issues.
To read the driver statistics for a particular port, use the following command:
cat /proc/be2iscsi/be2iscsi/driver_stats
where XX is the specific port number.
Setting the Log Level
The log level setting enables the logging of debug information in system logs for a
specific path, or all paths, in the driver.
There are two methods to set the log level:
1. User configurable driver parameters – use either of the following commands to set
the log level.
Note: The new log level value will take effect after the next reboot.
 # esxcfg-module -s “log_level=0xff” be2iscsi
or,
 # vmkload_mod be2iscsi “log_level=0xff”
2. ‘log_level’ proc entry setting – use the following commands to read and write
values to the log_level proc entry.
 cat /proc/be2iscsi/log_level
– This command displays the current log
level and help.