« NetApp Ranked #6 on List of Great Places To Work in Europe | Main | Kudos to the Winners of the 2011 NetApp Innovation Awards! »

June 01, 2011


Schley Andrew Kutz

They say imitation is the sincerest form of flattery. If that's so, then color me flattered. This new NetApp plug-in is exactly like the EMC VSI 4.0 plug-in for vSphere that was released last year (http://akutz.wordpress.com/2010/12/22/emc-vsi-4-0/). I'm flattered, I truly am :)

Vaughn Stewart

@Andrew -

Thanks for sharing. I admit, EMC has done one fine job in developing their plug-ins and that is no short order with the number of disparate array platforms they support VMware on.

it's funny how EMC and NetApp employees view things differently. EMC claims 70+ points of integration scattered among 5 or 6 or 7 array platforms. I wonder what the median average is in terms of integrations per array platform?

NetApp provides the most complete plug-in, delivering the same capabilities across all arrays with access via any protocol. This model enables solutions consistency, regardless of being deployed in the core datacenter or in a small ROBO office. We think hardware is simply a means to scale.

EMC & NetApp view the needs of customers differently.

I challenge your claims that NetApp is not the leader and offer the following content from 2009 as evidence...


Thanks again,

James Bothe

Does this replace SMVI? Should I not install that package and only use VSC 2.1?

Jason Benedicic

Hi Vaughn,

Are there any more details about the new MBR Tools available other than what is in the IAG?

In an ESXi environment I would usually just use a Linux machine to mount the NFS stores and run the tool against the VMDK's as a part of any P2V process.

However the latest tool won't even let me run the help command on my Ubuntu 10.04 machine.

Is it totally redesigned to only work with ESX now? Any information would be helpful.

Kind Regards,


@Vaughn - a few of us have noticed the mbrscan and (the newer) nfsstat -d output are not agreeing on the state of alignment - can you weigh in on if this just an interpretation of nfsstat -d output issue or if we actually have unaligned IO happening on what mbrscan says are aligned VMs?



Pedro Rocha


When mbralign will support ESXi, if so?

How can I automate alignment for VMs on ESXi 4.1, just as mbralign does?


Vaughn Stewart

@Fletcher - I don't have intimate knowledge around the data you are seeing with nfsstat, but I'd suggest you have an application in your VM that is creating a number of writes that are less than 4KB in size.

If what I suggest is accurate there's no need to be concerned, as it is normal behavior for the application.

I know you're well aware of misalignment, but please allow me to restate for those who may not be... What we want to avoid is having misaligned I/O for hundreds or thousands of VMs on an array. The inefficiency in I/O transfers due to a large mass of misaligned VMs will stress the array and lead to the eventual need to upgrade hardware.

Let me know if the small writes is or is not the case. I'd be happy to engage others to continue the conversation if needed.


Vaughn Stewart

@Pedro - We are woking on an official release targeted for the fall. Those pesky NDAs prevent me from sharing the details here.

If you need to address a misaligned ESXI environment today you should first upgrade to data Ontap 8.0.1. This release includes logic to better better handle the impact of misaligned workloads. After the upgrade you could consider a number of steps to actually align the VMDKs...
Wait for the MBRAlign releasee that supports ESXi
Running MBRAlign from an ESX host
Using a 3rd party alignment tool
Install MBRAlign in a Linux VM (btw - this model screams - its fast)

The comments to this entry are closed.