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Posts Tagged ‘VHDX’

Windows 2012 Hyper-V VHDX Disk format : Why should you convert your VHD to VHDX and how (Step by Step)

October 30, 2012 4 comments

Although this topic is not new I had some readers asking me about it. So here we go…

Windows 2012 Hyper-V has a new disk format : VHDX.

VHDX principal features

  • Storage capacity up to 64 terabytes (TBs). With the VHDX format we can to create larger virtual hard disks ( up to 64TB). The VHD format has a 2 TB limit to VHD’s.
  • Corruption protection during power failures
  • Optimal structure alignment for large-sector disks (4K sector aligned virtual hard disk), which increases the performance. Why Windows Server 2012 Hyper-V VHDX 4K Alignment Is So Important
  • Trim/Unmap – Space efficiency on VHDX files as well as the host disk
  • Thin provisioning
  • Ability to store custom metadata about the file that the user might want to record, such as operating system version or patches applied

You can convert a VHD into VHDX and vice versa. As long the size limit for the VHD is respected:

  • Shutdown the Virtual Machine
  • Double check if there is NO Snapshots
  • Double check if there is NO replication enabled
  • On the Hyper-V Manager,  on the left pane select Edit Disk…

  • Click on Next
  • On the Edit Virtual Disk Wizard, type the name and location of your existing VHD file or click on Browse to locate

  • Click on Next
  • On the Choose Action page select Convert and then click Next

  • On the Choose Disk Format page select VHDX and click Next

  • On the Choose Disk Type page select Disk type : Fixed or Dynamic  and then click Next

  • On the Configure Disk page type the destination path and then click Next

  • On the Summary page, click Finish to start the process. The process time depends on the VHD size.
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Counting down for August 15th…Windows 2012 #Hyperv. Reasons to upgrade…

August 9, 2012 Leave a comment

It is next week : August 15th that Windows 2012 will be available for download for MSDN subscribers. Are you ready to deploy it?

Enhancements in Hyper-V and Windows Server 2012 , on network (Teaming, Hyper-V Extensible Switch), multi-tenancy security, higher performance and flexibility.

The performance improvements in Windows Server 2012 over the Server 2008 R2, are huge :

  • Increases in the number of logical processors on server hardware, to 160 from 64;
  • Increases in the amount of physical memory, to 2TB from 1TB;
  • Increases in the number of virtual processors per host server, to 1,024 from 512;
  • Increases in the number of virtual processors per virtual machine, to 32 from four;
  • Increases in the amount of memory per virtual machine, to 1TB from 64GB;
  • Increases in the number of active virtual machines, to 1,024 from 384;
  • Increases in the maximum number of virtual nodes in a single server cluster, to 64 from 16;
  • Increases in and in the total number of virtual machines, to 4,000 from 1,000
  • New virtual disk version : VHDX ( with a built-in feature for preventing data corruption)
  • Virtual fiber channel ( making possible to offer the HBA in the host as a virtual HBA to the Virtual Machines)
  • SMB file shares to store Virtual Machines
  • Hyper-V Replica ( makes possible to create a replica of VMs on other Hyper-V hosts, even in – remote locations ) – ESSENTIAL in DR solutions.

Plus, true live storage migration, shared-nothing live migration, improvements in Dynamic memory… and counting.

Windows Server 2012 will also be available in the desktop version : Windows 8. You can install the Hyper-V on Windows 8 by navigating to the Control Panel and selecting Turn Windows features on or off and select the Hyper-V Platform option.

Note: One of the requirements of running Hyper-V on the Windows 8 edition is that the processor needs to support SLAT (Second Level Address Translation), otherwise Hyper-V will  not available.

Resuming, Windows Server 2012 has a lot of improvements and quite a lot of new functionality as well! So, enjoy the upgrade!