VSAN 6.2 Upgrade – Failed to realign objects

A number of customers have reported experiencing difficulty when attempting to upgrade the on-disk format on VSAN 6.2. The upgrade to vSphere 6.0u2 goes absolutely fine; it is only when they try to upgrade the on-disk format, to use new features such as Software Checksum, and Deduplication and Compression, that they encounter this error. Here is a sample screenshot of the sort of error that is thrown by VSAN: One thing I do wish to call out – administrators must use the VSAN UI to upgrade the on-disk format. Do not simply evacuate a disk group, remove it and recreate…

Cohesity Data Platform 2.0 is out

Cohesity have released their next version (2.0) of the Cohesity Data Platform. I met Cohesity at VMworld 2015, and  I wrote about my first impressions of the solution in a blog post from back in August 2015. In a nutshell, Cohesity are positioning their Data Platform as hyper-converged secondary storage. They want to stop the silo’ing of different storage for backups, file shares and analytics in the data center, and offer you a single platform for all of your secondary storage needs. Now they are ready with the next version, so lets take a quick look at what is coming…

Rubrik 2.0 is out, with a new model and a new service

Rubrik, who exited stealth only a few months ago, and launched their r300 series of converged data management appliance, have just announced version 2.0. You can read up of the Rubrik launch here. The 2.0 version has a new service called “Unlimited Replication” and a new appliance to the r300 series, the r348 “Hybrid Cloud Appliance”. Rubrik co-founder and CEO, Bipul Sinha, stated in the press release that Rubrik continues to transform “how companies approach data protection and recovery at scale”.

The value of Virtual Volumes (VVols)

Regular readers will know that I normally blog about the technical aspects of storage, as opposed to doing opinion pieces. However there have been a number of articles published recently questioning the value of VMware’s Virtual Volumes, commonly referred to as VVols. In general, the pieces I have read ask whether or not VVols (or to be more accurate, per-VM granularity feature of VVols) adds value when NFS is already doing per-VM granularity in the form of files. The point that was missed in these pieces is that VVols is so much more than per-VM granularity. I’ve just come back…

vSphere 6.0 HA and Component Protection with vMSC

I had a query recently about changes to vSphere 6.0, especially when it comes to vSphere HA and Component Protection (VMCP) with vMSC, vSphere Metro Storage Cluster. The question is very straight forward – do all the same advanced setting recommendations for PDL and APD apply to vMSC on vSphere 6.0 as they did for vSphere 5.5? Or do we have some new recommendations now around PDL and APD for vMSC with the introduction of VMCP in vSphere 6.0?

Virtual Volumes (VVols) and Replication/DR

There have been a number of queries around Virtual Volumes (VVols) and replication, especially since the release of KB article 2112039 which details all the interoperability aspects of VVols. In Q1 of the KB, the question is asked “Which VMware Products are interoperable with Virtual Volumes (VVols)?” The response includes “VMware vSphere Replication 6.0.x”. In Q2 of the KB, the question is asked “Which VMware Products are currently NOT interoperable with Virtual Volumes (VVols)?” The response includes “VMware Site Recovery Manager (SRM) 5.x to 6.0.x” In Q4 of the KB, the question is asked “Which VMware vSphere 6.0.x features are…

Virtual Volumes – A closer look at Storage Containers

There are a couple of key concepts to understanding Virtual Volumes (or VVols for short). VVols is one of the key new storage features in vSphere 6.0. You can get an overview of VVols from this post. The first key concept is VASA – vSphere APIs for Storage Awareness. I wrote about the initial release of VASA way back in the vSphere 5.0 launch. VASA has changed significantly to support VVols, with the introduction of version 2.0 in vSphere 6.0, but that is a topic for another day. Another key feature is the concept of a Protocol Endpoint, a logical I/O…