Category Archives: Config Guide

8 – Quality of Service

Historically the need to segregate fibre-channel traffic and have the option to prioritize frames and flows has not been high on design agenda of most of the companies...

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9 – Long Distance configurations

Storage networks have been used for disaster recovery and business continuity purposes for as long as fibre-channel existed. The moment arrays could communicate to other arrays over either...

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9.1 – Long Distance configurations – Direct Connect

Switch fabric configurations over dark fibre, direct connect, links are not much different then connecting them when they sit next to each other. There is no physical interference...

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9.2 – Long Distance configurations – CWDM/DWDM

One of the most complex ways of implementing long distance connectivity is using CWDM or DWDM extension equipment. Reason being is that the technology is often fairly complex...

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As I’ve written before some features in FOS 7.3 and older have been superseded by new tools such as MAPS and FlowVision.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