Skip to main content


Showing posts from February, 2013

The Team Expands

Hi All, my name is James Henderson. I have just joined the team here at myVMX and will be contributing alongside Kin Yung and Nuno Mota in providing articles, reviews, tips and tricks for a variety of different subjects.  Some of the areas I work around include: System Center Suite (with a particular focus on Operations Manager (SCOM), Apple iOS, Mobile Device Management, Certificate Services and a variety of others.  I hope my posts are of interest and I can't wait to get started.

Veeam Backup and Replication Cloud Enabled Edition

Veeam has just recently released backup and replication cloud edition. This allows you to use public cloud storage to store your backup as Veeam has written the required API to connect to these providers. Currently it supports the following 15 cloud storage providers listed below and I believe it will grow as the up take of the product happens: Amazon S3 Amazon Glacier Azure Openstack Rackspace Google HP Cloud Clodo Haylix Scality Dunkel Tiscali HostEurope DreamObjects GreenQloud Seeweb Connectria Walrus Mezeo Veeam is a great backup product and I have been using it in my test lab to help me backup my lab machines. There are some questions which should be thought through before using a cloud storage provider for backup; Does your data have to be held within a country? region?  due to sensitivity? or restricts? As you may not know how these providers distribute or store your data you need to understand this in case it is breaking some laws for the data you have

Released: Exchange Server 2010 SP3

Finally the much anticipated SP3 for Exchange 2010 has just been released! It brings the features and capabilities: Support for installing and deploying Exchange 2010 on Windows Server 2012; Support for Internet Explorer 10 to connect to Exchange 2010; Fixes; Coexistence with Exchange 2013 . Important: Exchange 2010 SP3 allows Exchange 2010 servers to coexist with Exchange 2013 CU1 , which is scheduled to be released in February 27th.   Please also note that this Service Pack requires schema updates.   DOWNLOAD it here .

vsphere 5 netapp NFS disconnect bug

I have just read on two blog post by Cormac Hogan and Vaughn Stewart where there seems to be an issue with vSphere 5.x connected to Netapp using NFS. On occasions where there is high load (I/O) the datastores would disconnect or disappear for a period of time and then reappear. There is some work around available which are 1) Reduce the max queue depth down to 64 2) If you have license to use storage I/O control then this would help prevent the issue 3) Upgrade ONTAP to either 7.3.7 P2, 8.0.5 or 8.1.3 We are not currently experiencing these issues but we will be implementing option 1 in case it happens suddenly. In the long run we are planning the upgrade of ONTAP so that we can fix the issues. Here are the blog posts from Cormac Hogan, Vaughn Stewart and VMware KB article

Disk timeout value for guest OS on Netapp NFS storage

There is a setting which should be applied to all VM guest OS if you are using Netapp NFS storage as your datastore for your VMs. This setting increases the disk timeout value to 60 or 190. The setting is to prevent VM’s from blue screen, restart or lose connectivity if a netapp cluster fail over does occur. Although failovers usually take less than a minute this is a precaution so that the VMs stay up and delay the write to disk for up to 190 seconds. You can get the settings by installing VSC which will give you the ISO to mount onto the vm to apply the change. Here is the reg value for Windows OS as that is what we primarily use: HKLM\SYSTEM\CurrentControlSet\Services\Disk\TimeoutValue to DWord 190

Vmware Fling Inventory Snapshot

Recently we have been rebuilding our vCenter to become a virtual machine. Rebuilding vCenter is easy but to take over all the roles, permissions and VM folders it could be a real pain. I found this little app on vmware flings called “inventorysnapshot”. This application will capture all details including roles, permissions and VM folders. It will then create a powershell script which you then run against the new vCenter. The script would populate all the folders, add the host from the old vCenter to the new vCenter. Move all the VM’s to the correct folder and assign all the permissions!!! How cool is that. Be aware though, use it when you are doing a complete migration as it removes the host from the old vCenter and add to the new one so notify people before you do the move ^_^. Turn off DRS and HA from the old cluster as well in case The software can be obtained from here:

Exchange 2010 dropping network packets( vmxnet3)

At my work place we have our Exchange 2010 running completely on VMware. We use SCOM as our main monitoring tool so we purchased Veeam nWorks to pass on all the metrics to SCOM and generate alerts where needed. Over the pass few weeks we started to receive alerts regarding dropped packets from an host. At first we thought we had over subscribed the bandwidth but after looking at performance charts within vCenter for the host. We noticed that we had been having drop packets for a while but was unaware of the issues as it never hit the threshold for SCOM to send an alert for us. After seeing this we quickly checked across all our host in case we had an underlying issue waiting to happen and found out is was only happening on host which was hosting exchange. Further investigation we discovered it was coming from just our mailbox servers. There was an article released from VMware regarding this problem. The issue is due to the fact we are using vmxnet3 network cards and when Exchan

New Exchange License Cmdlets

We all know the old script to count the Client Access Licenses [CALs] in Exchange 2010 was never 100% accurate... With Exchange 2013, two new cmdlets were introduced: Get-ExchangeServerAccessLicense and Get-ExchangeServerAccessLicenseUser . Get-ExchangeServerAccessLicense This cmdlet returns a list of licenses in use in an Exchange 2013 organization, with the legal name of the license as defined in the Microsoft Product List. If, for example, you want to check all the licenses in your organization, simply run the following cmdlet: Get-ExchangeServerAccessLicense The possible license names are: Exchange 15 Standard CAL Exchange 15 Enterprise CAL Exchange 15 Server Standard Edition Exchange 15 Enterprise Edition Get-ExchangeServerAccessLicenseUser This cmdlet, on the other hand, returns a list of unique users (their fully qualified domain name [FQDN] or primary SMTP address) representing an estimate of the licenses required when it is run. To chec