In case you didn’t notice, VMware has just released version 6.2 (the 4th version) of Virtual SAN, also known as VSAN.  One of the new features is data protection through erasure coding rather than mirroring of data.  Rather confusingly, the regurgitated press releases and many of the of the official blogs seem to be describing the new data protection regime as both RAID-5/6 and erasure coding.  Many of the product screen shots show this too.  So what is VMware offering here, is it RAID or erasure coding?

RAID

For the sake of…