VMware VCP6-DCV Delta Exam Differences

VMwares exams for their latest VMware Certified Professional 6 Data Center Virtualization (VCP6-DVC) certification are available in 2 weeks. If you are already certified, VMware makes it easier to upgrade to the latest version. Without any further requirements, you can register for the VCP6 Delta Exam. Please remember that VCP-level certifications will expire after 2 years.

First available appointment for both exams is August 30, 2015.

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virten.net now powered by NGINX

nginxLast sunday I’ve migrated virten.net from Apache to nginx. I’ve used Apache as Webserver since I can remember but in the last month it has become slower and slower. The blog is running on a dedicated server and delivers about 1 million pages and 8 million requests in total per month (including bots, crawlers and spiders). This huge load was too much for my apache and it started to delay the delivery of pages.

After some weeks of background testing, I switched the DNS to the new host yesterday at about 17:00. If you’ve encountered any issues, please do not hestitate to contact me.

As you can see from the graph, the total page load time has been significantly reduced, and while the first day is almost up, I haven’t seen any issues.


Match Linux SCSI Devices (sdX) to Virtual Disks in VMware

This post explains how to correlate SCSI devices within a Linux virtual machine to the virtual disk configured in the Virtual Machine. This can be accomplished by comparing the SCSI ID listed the Linux Guest OS and the virtual machine configuration in the vSphere client.match-linux-scsi-devices

In the vSphere Client disks are numbered without any reference to their SCSI ID. Linux operating systems numbers disks based on their SCSI ID and in order of appearance. Usually, the first disk is /dev/sda, the second /dev/sdb and so on. But if you want to remove a disk for example you want to make sure to identify the disk correctly.

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“Unsupported SVGA driver” during Windows 10 upgrade in VMware Workstation

windows-10-upgradeUpgrading Windows 7, 8 or 8.1 to Windows 10 in VMware Workstation fails with the following error message:

Unsupported SVGA driver

The issue only applies to the Microsoft Update Validation Tool which has problems with the VMware SVGA driver. To resolve this issue, use the Windows 10 ISO to upgrade your Virtual Machine.

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VMware Homeserver – ESXi on 5th Gen Intel NUC

Intel NUCs are not officially supported by VMware but they are very widespread in many homlabs or test environments. They are small, silent, transportable and have a very low power consumption, making it a great server for your homelab. I’ve posted a preview at the beginning of the year and got my first 5th Gen NUC up and running in February. Today all versions of the NUC, including the flagship with the i7 CPU, are available in the market. Time to give it a more detailed review


5th Gen Intel NUCs are available with an Intel i3, i5 or i7 CPU. The Intel i3 and i5 are available with and without 2.5″ slot where the i7 is only available with 2.5″. With the NUC5i5MYHE there is also a i5 model with a faster vPro CPU.

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ESXi 6.0 May 2015 CBT Fix Patch (Build 2715440)

VMware has republished the patch for ESXi 6.0

Product: VMware ESXi 6.0
Release date: May 14, 2015
Patch: ESXi600-201505001
Build: 2715440
Links: KB2116125 | Download

The update resolves the CBT Bug

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New Tool: Decoder for ESXi SCSI Sense Codes

scsi-sense-codeI’ve published a new tool that helps to quickly decode SCSI error codes displayed in vmkernel.log when something gone wrong. The tool uses an internal database to translates SCSI codes to human readable status information.

VMware ESXi SCSI Sense Code Decoder

Please do not hesitate to comment when there are any questions, or you’ve encountered an error with the decoder.

How does it work? Let’s assume that your vmkernel.log shows the following error mesage:

2011-04-04T21:07:30.257Z cpu2:2050)ScsiDeviceIO: 2315: Cmd(0x4124003edb00) 0x12, CmdSN 0x51 to dev “naa.[…]” failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x24 0x0.

Simply enter the colored hexadecimal numbers to the form and press Submit:

The result and a short description is displayed:

When you’ve entered all information, you can copy the URL for future reference. You can find the above example here.

ESXi 5.5 May 2015 Patch (Build 2718055)

VMware has republished the patch for ESXi 5.5 (ESXi550-201504002) that has been recalled this week.

Product: VMware ESXi 5.5
Release date: May 8, 2015
Patch: ESXi550-201505002
Build: 2718055
Build (security only): 2702869
Links: KB2114245 | Download

The update resolves 41 issues including the following: Read more »

VMware Recall: ESXi 5.5 Patch Release ESXi550-201504002

warningVMware has recalled the latest ESXi 5.5 Patch, released on April 30, 2015.

Affected Product:
VMware ESXi 5.5 Patch Release ESXi550-201504002
(build number: 2702864)

After upgrading to VMware ESXi 5.5 Patch Release ESXi550-201504002 (build number: 2702864) with VMware NSX for vSphere 6.x or Cisco Nexus 1000v, Virtual machines on VXLAN wires are unable to communicate across hosts with their Edges or Distributed Routers.

If you have already upgraded, perform a rollback to the latest version:

  1. Reboot ESXi Host
  2. When the Hypervisor progress bar starts loading, press Shift+R.
  3. The following warning is displayed:Current hypervisor will permanently be replaced
    with build: X.X.X-XXXXXX. Are you sure? [Y/n]
  4. Press Shift+Y to roll back the build
  5. Press Enter to boot

How to get “Use Windows session” Checkbox to work in VCSA6

You’ve just installed vSphere 6 vCenter Server Appliance (VCSA) and want to use the “Use Windows session authentication/credentials” checkbox like you know it from the vCenter Server running on a Windows Server?

You’ve already added an Active Directory as Identity source, and you can login with AD users, but the “Use Windows session authentication/credentials” still does not work?

You see the following error messages in the vSphere Client:
Windows session credentials cannot be used to log into this server.

Or in the vSphere Web Client (If the checkbox is greyed out, install the Client Integration Plugin from the bottom of the login page):
Incorrect username/password

This post explains how to get the “Use Windows session” checkbox to work

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