Category Archives: Troubleshooting

Data Corruption in Storage Area Networks

If there is one thing that gets people relatively annoyed is that their data is not available for a certain amount of time. You can’t get to your...

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Fibre Channel, Troubleshooting , , , ,

Host based mirroring kills your storage network!!

System administrators are very inventive and lazy. I know, I used to be one of them. 🙂 Everything that can be done to make ones life easier is...

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Why frames get dropped at your storage array

Arrays from all vendors have significant troubleshooting capabilities but in most cases these are scambled in the most obscure way you can imagine. You need special tools to...

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Reset the Zoning Configuration and Prevent Mistakes.

There are occasions where you need to remove an entire zoning configuration from a switch. One of them is if you need to add a switch to an...

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Brocade Technical, Config Guide, Troubleshooting , , , ,

Appalling state of Storage Networks

In the IT world a panic is most often related to a operating systems kernel to run out of resources or some unknown state where it cannot recover...

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Upgrade to FOS 7.4.x fails due to APM performance monitors

As I’ve written before some features in FOS 7.3 and older have been superseded by new tools such as MAPS and FlowVision. On of those is also Advanced...

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Open Source Software (OSS) and security breaches in proprietary firmware

It is no secret that many vendors use open source software in their products and solutions. One of the most ubiquitous  is Linux which is often the base...

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Brocade, Brocade Technical, Cisco, Config Guide, Troubleshooting , , , , ,

Performance misconceptions on storage networks

The piece of spinning Fe3O4 (ie rust) is by far the slowest piece of equipment in the IO stack. Heck, they didn’t invent SSD and Flash for nothing,...

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Config Guide, Linux, Storage, Troubleshooting , , , , ,

Brocade “compatible” SFP’s will disrupt your fabric.

As with all good stuff there are always people and companies that try to jump on the bandwagon and make some dollars by using cheap kit and sell...

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Brocade Network Advisor Performance Graphs flatline

One of the regularly used features in BNA is the ability to retain performance numbers and a history of port errors. It is then most annoying when these...

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