Windows Hyper-V improvement for Linux virtual machines that have file systems that are larger than 2 TB

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials More

Symptoms


Consider the following scenario:
  • You have a Linux virtual machine that runs on a Hyper-V host in Windows 8.1, Windows Server 2012 R2, Windows 8, or Windows Server 2012.
  • You try to format a Linux file system (such as by using the mkfs command) that is larger than 2 terabytes (TB) in the virtual machine.
In this scenario, the format operation fails, and the file system is not usable.

Cause


This issue occurs because Hyper-V does not update the sense information correctly for the WRITE SAME SCSI command that is issued by the Linux virtual machine.

Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information


For more information about software update terminology, see the Description of the standard terminology that is used to describe Microsoft software updates.