vSAN Erasure Coding Failure Handling

I had a very interesting question recently about how vSAN handles a failure in an object that is running with an erasure coding configuration. In the case of vSAN this is either a RAID-5 or a RAID-6. On vSAN, a RAID-5 is implemented with 3 data segments and 1 parity segment (3+1), with parity striped across all four components. RAID-6 is implemented as 4 [...]

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Auto LUN Discovery on ESXi hosts

Did you know that any newly presented LUNs/paths added to an already discovered target will automatically be discovered by your ESXi host without a rescan of the SAN? In this [...]

VOMA – Found X actively heartbeating hosts on device

One of the long-awaited features introduced with vSphere 5.1 was VOMA (vSphere On-disk Metadata Analyzer). This is essentially a filesystem checker for both the VMFS metadata [...]

Error while adding NFS mount: NFS connection limit reached!

The advanced setting SunRPC.MaxConnPerIP defines the maximum number of unique TCP connections that can be opened for a given IP address. This is of particular interest to [...]

vCenter Server 5.1.0b Released

This is a follow-up to my previous post on the 5.0U2. At the same time, VMware also released vCenter 5.1.0b. This post will look at the storage items which were addressed in [...]

vCenter 5.0U2 and ESXi 5.0U2 Released

Hi all, Prior to the holidays, VMware released new versions of vCenter & ESXi on December 20th. There were new releases for both vSphere 5.0 & 5.1. In this post, I [...]

Heads Up! NimbleOS Maintenance Release 1.4.4.0

Folks, if you are a Nimble Storage customer, and I know many of my readers are, then you need to be aware of a new NimbleOS release. A new maintenance update, NimbleOS [...]

New updates from Nutanix – NOS 3.0 and NX-3000

Yesterday I had the opportunity to catch up with a very good friend of mine, Ray Hassan, who is now part of the Nutanix team in the UK. Ray took some time out of his very [...]