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qla2x00t/doc/qla2x00t-howto.html: Add information about initiator and target modes

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Qlogic documentation lack of the information about initiator and target modes
usage.
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Gleb Chesnokov
2022-05-23 18:43:13 +03:00
parent f7fabfd200
commit 55ba4339dd
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qla2x00t/doc/qla2x00t-howto.html
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@@ -231,6 +231,31 @@ Now let's create our virtual device:
<pre>[root@proj ]# make -C scstadmin -s install</pre>
</li>
<li id="qlini_mode"> Initiator and target modes <br><br>
The qla2xxx_scst module has parameter "qlini_mode", which determines when initiator mode will be enabled.<br>
Possible values:
<ul>
<li>"exclusive" (default) - initiator mode will be enabled on load, disabled on enabling target mode and then on disabling target mode enabled back.</li>
<li>"disabled" - initiator mode will never be enabled.</li>
<li>"dual" - initiator mode will be enabled. Target mode can be activated when ready (only <b>qla2x00t-32gbit</b>).</li>
<li>"enabled" - initiator mode will always stay enabled.</li>
</ul>
<br>
Usage of mode "disabled" is recommended, if you have incorrectly functioning your target's initiators, which if once seen a port in initiator mode, later refuse to see it as a target.
<br><br>
<b>qla2x00t</b> (old qlogic driver): <br><br>
Use mode "enabled" if you need your QLA adapters to work in both initiator and target modes at the same time.<br>
You can always see which modes are currently active in active_mode sysfs attribute.<br>
In all the modes you can at any time use sysfs attribute ini_mode_force_reverse to force enable or disable initiator mode on any particular port. Setting this attribute to 1 will reverse current status of the initiator mode from enabled to disabled and vice versa.<br>
<br>
<b>qla2x00t-32gbit</b> (new qlogic driver): <br><br>
Use mode "dual" if you need your QLA adapters to work in both initiator and target modes at the same time. In this mode, each qlogic host has individual <b>qlini_mode</b>, <b>ql2xexchoffld</b>, <b>ql2xiniexchg</b> attributes that can be changed dynamically.<br>
For example, you can change qlini_mode to "disabled" for specific qlogic host:
<pre>echo "disabled" > /sys/devices/pci0000:80/0000:80:02.0/0000:81:00.0/host1/scsi_host/host1/qlini_mode</pre>
</li>
<li id="target-mode">
To see the device on the initiator we have to add it in the LUNs set of our
target.<br> We must have a LUN with number 0 (LUs numeration must not start