iSCSI loses connections to EqualLogic SAN

We have a windows 2008 R2 with SQL. We configure 4 NICs connecting to target/SAN. We have some problems to access the SQL database recently. After reviewing both SAN Management console and iSCSI, we find there are only two connections show on iSCSI and SAN. Whenever we add other two connections, they are disappeared in a few seconds on both iSCSI and SAN. There are no errors in the Event Viewer and SAN log.

The SQL server has been working for many years. Just recently, the server starts having the problem. No major hardware and software changed except windows update.

In the iSCSI Discovery, we have this settings.

in EqualLogic SAN, we allow all 4 connections.

Whenever we add 2 more sessions in Volume Properties, they stay there for a few seconds and then disappear. SAN also show the new sessions for a few seconds and then disappear.

What could be the problem?

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Bob Lin

Bob Lin, Chicagotech-MVP, MCSE & CNE Data recovery, Windows OS Recovery, Networking, and Computer Troubleshooting on http://www.ChicagoTech.net How to Install and Configure Windows, VMware, Virtualization and Cisco on http://www.HowToNetworking.com View all posts by Bob Lin

3 thoughts on “iSCSI loses connections to EqualLogic SAN”

Reinstall the HIT (Host Integration Tool) from Dell .

Bob Lin says:

August 29, 2018 at 11:46 am

If reinstalling HIT doesn’t fix the problem, install latest firmware, NIC driver and BIOS possible.

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Installing NIT and dell server firmware and other updates doesn’t fix the problem. We believe the problem is “The iSCSI target device has reached its limit for the number of incoming connections”. Please refer to this post: iSCSI problem with Event ID: 1, 5, and 70

Published by

Bob Lin

3 thoughts on “iSCSI loses connections to EqualLogic SAN”

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