vSAN Stretched Cluster: PFTT and SFTT what happens when a full site fails and multiple hosts fail?

Advertise here with BSAThis question was asked on the VMTN community forum and it is a very valid question. Our documentation explains this scenario, but only to a certain level and it seems to be causing some confusion as we speak. To be honest, it is fairly complex to understand. Internally we had a discussion with … [Read more...]

Doing maintenance on a Two-Node (Direct Connect) vSAN configuration

Advertise here with BSAI was talking to a partner and customer last week at a VMUG. They were running a two node (direct connect) vSAN configuration and had some issues during maintenance which were, to them, not easy to explain. What they did is they placed the host which was in the “preferred fault … [Read more...]

Starwind software: SFD15 preview

It is time to start blogging again, and there couldn’t possibly be better way then by starting on my invite to Storage Field Day 15 in Silicon Valley. Truth be told, not blogging was mainly due to building our own house, and we’re still very busy with building our dream house here in the Netherlands, […] … [Read more...]

Using a vSphere custom TCP/IP Stack for iSCSI

Advertise here with BSAI noticed a question today on an internal slack channel and it was about the use of custom TCP/IP stacks for iSCSI storage environments. Cormac and I updated a bunch of Core Storage whitepapers recently, and one of them was the iSCSI Best Practices white paper. It appears that this little section … [Read more...]

vSAN Adaptive Resync, what does it do?

Advertise here with BSAI am starting to get some more questions about vSAN Adaptive Resync lately. This was introduced a while back, but is also available in the latest versions of vSAN through vSphere 6.5 Patch 02. As a result various folks have started to look at it and are starting to wonder what it is. Hopefully by … [Read more...]

Where is the vSAN storage performance proactive test in vSphere 6.5 U1 patch 02?

Advertise here with BSAI had some customers asking where the storage performance proactive test and the multicast proactive test was in the latest release of vSAN. In the past this is what the UI looked like when they would go to the Proactive Test section: But now it looks like this: What happened? Well, two tests … [Read more...]

Holiday gift: vSAN Essentials book available for free

Advertise here with BSAChristmas is coming so Cormac and I figured we would do something special for everyone, after a long debate we decided to make the vSAN Essentials book available for free. Note that this is the “Essential Virtual SAN” book which was published by VMware Press / Pearson and is based on … [Read more...]

Insufficient configured resources to satisfy the desired vSphere HA failover level

Advertise here with BSAI was going over some of the VMTN threads and I noticed an issue brought up with Admission Control a while ago. Completely forgot about it until it was brought up again internally. With vSphere 6.5 and vSphere HA there seems to be a problem with some Admission Control Policies. When you for … [Read more...]

Using HA VM Component Protection in a mixed environment

Advertise here with BSAI have some customers who are running both traditional storage and vSAN in the same environment. As most of you are aware, vSAN and VMCP do not go together at this point. So what does that mean for traditional storage, as in with traditional storage for certain storage failure scenarios you can … [Read more...]

Sharing the #TechConfessions video

Advertise here with BSAAt VMworld I sat down with Amy Lewis and had my Tech Confession. Where/When/How did I have my Software Defined  world. I would also highly recommend the tech confession by William Lam and Alan Renouf, both are very interesting. Make sure to follow the channel, and watch the other videos as well, … [Read more...]