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EMC Host Connectivity with QLogic FC and iSCSI HBAs and FCoE CNAs for the Linux Environment
Additional Notes
Device reconfiguration procedures for the iSCSI 3.x driver
The Linux v2.4.x kernel lacks a command built into the kernel that
allows for a dynamic SCSI channel reconfiguration like drvconfig or
ioscan.
The methods of rescanning the SCSI bus in a Linux host are:
◆ Rebooting the host
◆ Unloading and reloading the modular QLogic iSCSI driver
Rebooting the host
Rebooting the host will reliably detect newly added devices. The host
may be rebooted after all I/O has stopped, whether the driver is
modular or statically linked.
Unloading and reloading the modular QLogic driver
Depending upon the hardware configuration, it is possible to unload
and reload the modular QLogic driver. This driver removal from and
reinsertion into the kernel will cause a scan of the SCSI bus and will
cause the driver to detect any newly added device(s).
If the driver is to be removed from and then reinserted into the
kernel, perform the following before removing the driver:
◆ Stop all I/O.
◆ Unmount all filesystems attached to the QLogic iSCSI driver.
◆ If the Naviagent/CLI is installed and enabled on the host, then
the Naviagent/CLI service must be stopped.
To stop the Naviagent/CLI service, issue one of the two following
commands:
/etc/init.d/naviagentcli stop
or
service naviagentcli stop
◆ If PowerPath is installed and enabled on the host, then the
PowerPath service must be stopped.