While going through my email folders I noticed an email chain about disabling your USB controller to avoid avoid the well known IRQ sharing situation. This has been extensively described in KB Article 1003710. In short: IRQ Sharing limits interrupts to a single CPU. Normally this isn’t a problem but the Service Console is locked to CPU 0 which thus [...]

Jason Perlow writes for ZDNet.com a respectable online magazine. Jason wrote an “excellent” article about VMFS-3 and the fact that it was so hard to copy files from and to these volumes. (“VMware bad / Microsoft good” is the tone of the article.) Jason could only get the trick done by creating an NFS share, mounting it and then copy [...]

Of course by now we have all read the excellent and lengthy posts by Chad Sakac on ALUA. I’m just a simple guy and usually try to summarize posts like Chad’s in a couple of lines which makes it easier for me to remember and digest. First of all ALUA stands for “Asymmetric Logical Unit Access”. As Chad explains and [...]

For me personally it’s a sad day because my colleague, Yvo, has just resigned. Yvo is part of the VMware PSO Benelux team as a Senior Consultant and Operational Readiness Practice Lead and besides a great guy also one of the best consultants I ever worked with. Of course I am happy for Yvo and fully understand his decision as [...]

I wrote about two weeks ago and back in March but the issues with false memory alerts due to large pages being used have finally been solved. Source Fixes an issue where a guest operating system shows high memory usage on Nehalem based systems, which might trigger memory alarms in vCenter. These alarms are false positives and are triggered only [...]

I’ve seen this floating around the communities a couple of times and someone also mentioned this during a VCDX Panel: setting limits on VMs when you are not allowed to decrease the memory. For example you want to P2V a server with 8GB of memory and an average utilization of 15%. According to normal guidelines it would make sense to [...]

I receive the same question around dvSwitches almost every week; should I only use dvSwitches or go for a hybrid model? The whitepaper that has been released a couple of months ago clearly states that a hybrid model is a supported configuration but would I recommend it? Or would a pure vDS model make more senses? Let me first start [...]