Search Results for: alua

Aloha ALUA

This is the second part of my deep dive into a bunch of storage acronyms, concepts and terminology we all have read at some points. Perhaps you’d prefer start by reading part one before going on with part two although this is … Continue reading

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Performance Evaluation of VMXNET3 Virtual Network Device

This paper compares the networking performance of VMXNET3 to that of enhanced VMXNET2 (the previous generation of high performance virtual network device) on VMware vSphere 4 to help users understand the performance benefits of migrating to this next‐generation device. Source: … Continue reading

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Do You VMOSA?

For the past many years as a contractor and several missions where I could help Organisations assess, diagnose, audit and evaluate their virtual infrastructures and cloud initiatives I stumbled upon the fact that many of them just lack a strategic planning process. Eventually those who actually have … Continue reading

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It All Started With This Question…

…I shoot on Twitter: Can anyone cite me an Active/Active storage array that supports ALUA? An important information is missing from my question. Precisely I’m talking about symmetric storage arrays. So let me rephrase my question to: Can anyone cite me … Continue reading

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VMware vSphere Design – The What, The Who And The How

I’ve just bought VMware vSphere Design book authored by a trio of experts in the matter: Forbes Guthrie, Scott Lowe and Maish Saidel-Keesing. This week-end I started to read the book and from the first chapter titled An Introduction to Designing VMware Environments, extreme valuable … Continue reading

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VMware PSA, MPP, NMP, PSP, MRU, … And Tutti Quanti!

And tutti quanti because this time I wanted to deep dive a bunch of storage acronyms, concepts and terminology we all have read at some point in VMware documentation, white papers and slides but also in storage vendors’ publications.  Things like PSA, MRU, … Continue reading

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How To Troubleshoot a Broken RAID Volume On a QNAP Storage Device

Something like four weeks ago I had a major issue with my QNAP TS-459 Pro storage device. I did a simple firmware upgrade and whoop my RAID0 volume was gone, oops! So I was left with three stand alone disks as … Continue reading

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ESX3.5/vCenter2.5 Slot Size Calculation For vCheck v5

I’ve been working like crazy the last four weeks on different projects. One of them was about a Powershell script that would do HA Slot Size calculation for an ESX3.5/vCenter2.5 environment. Like a lot of vAdmins I use Alan Renouf‘s … Continue reading

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Upgrading Home Lab – Part I

It was time to upgrade and enhance my home lab to stick with my needs. First of all I finally decided to buy an Intel SSD X25-M G2 160GB on eBay. So the Intel SSD got delivered this week and I … Continue reading

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HP MSA2000i and vSphere – Tweaks and Findings

The other day at a customer place, I had to troubleshoot some performance issues with a 2 years old HP MSA2000i.  The ‘ i’  stands for iSCSI. The storage runs two active/active iSCSI HBA controllers. Each controller has also one … Continue reading

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