Diagnosing and Troubleshooting Common SAN Fabric Errors

SAN Fibre (or Fabric) Errors Issues can really cause a lot of headaches for the configuration and performance of your SAN infrastructure. Here’s a look at some of the most common SAN Fabric errors and their potential fixes.

Common Error 1: Invalid Ordered Set Flow Control

Invalid ordered sets essentially have to deal with flow control, and you can get these under a few different conditions.

The first condition especially happens with older microcode. This is where you get into a Fill-Word situation where the fill word is not set correctly. This was the case in Figure 1 below. We can see that at around 4:00 PM the errors completely dropped.

Invalid Ordered Sets

Figure 1: Invalid Ordered Sets


This occurred because the fill words were fixed on the switches that were having the problem.

Common Error 2: Invalid Ordered Media Issues

Another issue that can occur regarding invalid ordered sets or invalid transmission words may be issues with your media, which may be your GBIC’s or your fiber optic cables. To avoid these common SAN Fabric issues, you want to make sure those are tight, clean, and undamaged.

Figure 2 below shows the Cycle Redundancy Check (CDC) Errors.

Figure 2: Cyclic Redundancy Check (CDC) Errors


We can see that the errors happened between 10:15 AM and 3:15 PM. These definitely indicate a problem with the media. This is an encoding error and it means that the frames are being marked invalid because of some problem along the data path.

A roundup of the other Common Physical Media Errors include:

  • Discards
  • CRC’s when there are timeouts
  • Frame issues
  • Transmission order issues

You’ll also see link failures and signal failures when you have issues where a host bus adapter resets, or a cable is unplugged or receded.

Common Error 3: Buffer Credit Issues

Buffer credit issues are issues where you don’t have enough buffers to transmit or receive data and those actions are made to wait until there’s enough buffer credit available. We tend not to dive into these issues unless there are significant numbers.

Zero Buffer to Buffer Credits

Figure 3: Zero Buffer to Buffer Credits


Resolve Common SAN Fibre Channel Issues with Built-in AI

Watch the full video above for a detailed walk-through of these common SAN Fibre Channel issues.

Thanks to the AI based best practice compliance ratings built into IntelliMagic Vision for SAN Fabric, most issues related to the configuration, capacity, or performance of your SAN infrastructure can be automatically identified and quickly resolved.

For more information on how IntelliMagic Vision can reduce risk and improve performance in your SAN environment contact us at info@intellimagic.com, or click here to start your trial today.

Related Resources


Improve Collaboration and Reporting with a Single View for Multi-Vendor Storage Performance

Learn how utilizing a single pane of glass for multi-vendor storage reporting and analysis improves not only the effectiveness of your reporting, but also the collaboration amongst team members and departments.

Watch video

A Single View for Managing Multi-Vendor SAN Infrastructure

Managing a SAN environment with a mix of storage vendors is always challenging because you have to rely on multiple tools to keep storage devices and systems functioning like they should.

Watch video

Cleaning up the SAN Fabric: Getting Your House in Order Part Two

Cleaning up SAN fabric zones and storage array masking views are often a forgotten part of good storage hygiene. Although unused zones and masking views may seem harmless, they pose an availability risk to your environment on multiple fronts.

Read more

Go to Resources

Request a Trial or Demo

Whether you’re in the early stages of product research, evaluating competitive solutions, or trying to solve a problem, we’re happy to help you get the information you need to move forward with your IT initiatives.

Discover End-to-End SAN Performance, Capacity, and Configuration Monitoring

IntelliMagic Vision for SAN

End-to-End SAN Performance, Capacity, and Configuration Monitoring

Learn More

IBM Spectrum Virtualize, SVC

Performance Management for IBM Spectrum Virtualize, SVC and Storwize

Learn More


Performance Management for HPE 3PAR StoreServ Storage

Learn More


Performance Management for NetApp FAS

Learn More


Breakthrough integration of VMware performance and configuration data

Learn More


Performance Management for Dell EMC VMAX

Learn More

Show all

Flexible Deployment and Monitoring

On Premise

Install the software on premise and use it offline

In the Cloud

The Cloud based deployment can be accessed from everywhere in the world and is easy to share with colleagues,

Add On Services

Get help with the deployment and the management of the software

Request a Free Trial or Schedule a Demo Today

Discuss your technical or sales-related questions with our availability experts today