Broadcom/qlogic npar distributed and strategy MPIO on Windows 2012R2

Hello

I enabled Distributed on partition 0 in our FC630, card broadcom/qlogic 10GbE. After all configured on MS iscsi initator then I saw all the paths were active for some time (10-20 min), then one of the paths is all just disappeared and never reconnected.

I see the message "disconnection request has been received from the initiator" on the EQL newspaper but is not very useful. Curiously, it was precisely the LUN; I saw no problem for vss-control. So I was check the option and I noticed that if I change the "least queue depth" MPIO "failover only" then I see no loss path.

As I'm not sure why the default "least queue depth" option does not work, I would be grateful for any insight and details.

Thank you

Hello

If you open a support case, they probably have you say that it works as expected.  Since EQL FW 6.x our MPIO code negotiates connections as needed.  To ensure effective performance and minimize the number of connections.

The event message you included confirms that.  The "requested disconnect" comes the HIT MPIO code.  The 6210 has vertical tipping so with little traffic that one connection is necessary. A failure of the cable or switch will not lower your volume.   If the load rises another connection will be established.

The settings in the registry that Michael mentioned substitute is no longer trading code in the firmware and the HIT.

Is there a feature request for the connection of two minimum for better offer peace of mind to our customers during this behavior.

Since you are dealing with a single member, the greater benefit of our code MPIO is not be used.   This requires several members in a pool.   With a single member, you won't see any difference w/LQD on Round Robin.

Kind regards

Don

Tags: Dell Products

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