Thick or thin VMDKs on VMAX

Thick or thin? This is a question I get in almost all best practice discussions with customers and while I cover it in the TechBook and elsewhere, I thought I'd do a quick post on it without all the extras. VMware offers 2 types of disks - thick or thin - and 3 disk types - thin, zereoedthick,... Continue Reading →


VSI 7.3

Happy New Year everyone. It's been a bit since I've posted but we do have a new VSI release to talk about. This one comes late as we do normally release quarterly, but seeing as it wasn't expected at all, I suppose a month late isn't bad. So last time I wrote about VSI, I mentioned 7.2 was most... Continue Reading →

Solutions Enabler vApp Installation/SRDF SRA

When it comes to configuring the SRDF SRA with SRM, many of our customers use an external Solutions Enabler installation rather than the one installed on the SRM server. The preferred implementation I see is the Solutions Enabler vApp. It is frankly the easiest since it does not require an OS, however there are a few configuration... Continue Reading →


EMC Storage Analytics (ESA) 4.4

ESA 4.4 is now available for download from This release of ESA is focused on RecoverPoint for VMs (RP4VM) and VPLEX with the following new features: Updated metric thresholds for EMC RecoverPoint for Virtual Machines to align with version 5.1 Support for additional metrics for EMC VPLEX Virtual Volumes and Storage View Support for the following... Continue Reading →


3-site SRDF with VMware SRM

As there is a 500 page TechBook on SRDF with SRM, it might seem a bit redundant to be covering a topic like this again, and perhaps it is; but as I have worked with customers and support over many months (and years), a few issues seem to recur. It's usually at that point I figure... Continue Reading →


Stranded space on VMAX All Flash datastores – can I get it back?

In a word, yes. Let me start with a basic explanation of VMware storage versus array storage. A VMAX All Flash (AFA) array is a completely thin-provisioned box. A hallmark of using a thin array with VMware invariably means what VMware reports as used storage in a datastore may not reflect what an array reports... Continue Reading →


SRDF SRA – Python script for masking functionality

Back in March we offered customers a way to generate the EmcSrdfSraTestFailoverConfig.xml file for the SRDF SRA test failover functionality when using the vCenter Appliance (VCSA). You can read all about that here. Recently we had a customer request to enhance the script to add the ability to create the EmcSrdfSraDeviceMaskingControl.xml file and our developer Sam went... Continue Reading →


Down Protection Site: VMware SRM TestFailover with the SRDF SRA

One of the great features of VMware SRM is the ability to run a test failover without impacting either the protection or recovery site. When using the SRDF SRA this means the replication between the R1 and the R2, whether asynchronous or synchronous, will not be broken. The SRA uses TimeFinder technology to accomplish this,... Continue Reading →


VSI 7.2 – vSphere 6.5 support

VSI 7.2 is available today for download here. This is quite a minor release, though not unimportant because it adds support for vSphere 6.5. Now you might say, wait I thought you introduced vSphere 6.5 support In VSI 7.1. Yeah, well we did kind of, but it was only support for the 6.5 Web Client... Continue Reading →


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