vExpert 2014 Award

vExpert-2014-Badge

Some of you might have noticed the badge I’ve added to my Blog.

I have to thank VMware for recognizing my efforts for the community and for awarding me with this title.

Thanks to this and to Corey Romero who granted me a Blogger Pass for VMworld in Barcelona I will be able to write about the conference pretty soon.

Stay tuned!

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ESXi 5.5 Update 2 build 2143827 break Citrix NetScaler

If you happen to run NetScaler and upgrade to build 2143827 of vSphere 5.5 you will run in very nasty issues.

Specifically, your NetScaler will go bonkers if you enter in the management web interface or even via SSH; in general all things that start a network increase in term of traffic directed to the NetScaler will make it crash.

When it doesn’t crash you will still experience network communication drops, hangs, connectivity issues and such and in a very random fashion too (just to add some fun).

Fortunately VMware gave us a workaround.

To work around this issue, add the line hw.em.txd=512 in loader.conf file.

To add the line hw.em.txd=512 in loader.conf file:

    1. Log in to the Citrix NetScaler virtual machine appliance as root
    2. Locate the loader.conf file on the Netscaler virtual machine appliance by running this command:find / -name loader.conf

Note: There are two loader.conf files. The two files are ./flash/boot/defaults/loader.conf and ./flash/boot/loader.conf.
Modify the first one and ensure to take a backup of the file prior to making the changes.

  1. Add this line in the loader.conf filehw.em.txd=512
  2. Save the changes
  3. Restart the NetScaler virtual machine appliance

For deeper details about the issue read KB VMware KB 2092809

Migrating NTUSER.DAT and UsrClass.DAT with Horizon Mirage

I don’t know about you but I found it to be a little weird that there is not way to tell Mirage to move NTUSER.DAT and UsrClass.DAT when performing an hardware migration.

Considering Mirage uses USMT to migrate the user state mean that this is a precise choice from VMware and not a technological limitation.

Those two files include two pretty important user settings: the user portion of the registry and the user class of the registry.

If you want to have the migrated workstation to have exactly the same look and feel, including the customization of the single applications settings, icon positioning on the desktop and so on you definitely want to apply NTUSER.DAT and UsrClass.DAT as well; I am sure there are scenarios where you don’t want this but there are also scenarios but if you want you should be able to do it.

In the Factory Defaults this is explicitly forbidden, so if you want to apply NTUSER.DAT and UsrClass.DAT too you need to follow this procedure:

  • Log in to your Mirage Management Server
  • Open a command line as administrator
  • Browse to C:\Program Files\Wanova\Mirage Server
  • Launch the Server CLI: “Wanova.Server.Cli.exe <server name/ip>” of your Mirage Management Server such as <localhost>
  • Enter: “GetFactoryPolicy c:\factorypolicy.xml” (Get the current factory policy)
  • Edit the file c:\factorypolicy.xml (e.g. with notepad,notepad++)
  • Save the file by entering: “SetFactoryPolicy c:\factorypolicy.xml”

When editing the file, you can search for “NTUSER” and “UsrClass.dat” and just remove the lines with “”.

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