Microsoft Windows Server Insider Preview Build 16278 available

Microsoft Windows Server Insider Preview Build 16278 available.

How to Download 

The following keys are available for unlimited activations of Windows Server. These keys may be used throughout the pre-release cycle.

  • Windows Server Datacenter Core: B69WH-PRNHK-BXVK3-P9XF7-XD84W
  • Windows Server Standard Core: V6N4W-86M3X-J77X3-JF6XW-D9PRV

The expiration date for this server preview build is 12/4/2017.

Developers and Containers:

  • New base container images (available on Windows Insider Docker Hub repo)
    • Optimized Nano Server base image (over 70% smaller)
      • The .NET team is providing a preview image based on Nano Server with .NET Core 2.0
      • The PowerShell team is providing a preview image based on PowerShell 6.0
    • Optimized Server Core base image (over 20% smaller)
  • Support for SMB volume mounting
  • Infrastructure for Orchestrators
    • Networking enhancements for ongoing Kubernetes work
    • Named pipe mapping support
  • Bug fixes, performance enhancements

Cloud Guest:

  • IIS
    • TLS info: administrators can make specific recommendations to default to HTTPS
  • Disaster Recovery
    • Storage Replica Test Failover
  • Guest + Host better together
    • vPMEM in Guest: Tenants can use and manage PMEM/SCM
    • Tenant-Aware VM Start Ordering: App Ready / OS Heartbeat for better load balancing
    • Guest RDMA
  • Improvement in time accuracy
  • Azure enlightened clusters – optimized to run on Azure IaaS

Cloud Host:

  • Software Defined Data Center (SDDC) host
    • Security
      • Shielded Linux VM
      • SDN: Encrypted virtual networks
      • Secure clusters
      • SMB 1 disabled by default
    • Resiliency and Availability
      • SDN: Reduced downtime for tenant connections through gateways
      • Spaces Direct: Scoped Spaces to mitigate impact of multi-node loss
      • Spaces Direct: Marginal drive handling for predictive detection of drive failures
    • Efficiency
      • Data Deduplication available for ReFS
      • New Data Deduplication DataPort API for optimized ingress/egress
      • Space efficiency with ReFS Compaction
      • Performant Spaces Direct Multi Resilient Volumes (MRV)
    • Hyper-converged Scale
      • Cluster Sets: Significantly increases hyper-converged SDDC cloud scale by grouping multiple clusters into a larger fabric
    • Hardware support
      • Support for Storage Class Memory (SCM) in Spaces Direct

 

 

Known issues 

  • [New] Starting a system in the Windows Preinstallation Environment (WinPE) from a Fat32 disk partition in UEFI mode can fail, depending on the position of \sources\BOOT.WIM within the partition. This issue can block imaging and installation of the operating system.
  • Apps that call into the firewall, such apps that use networking, may become unresponsive until the user reboots because of an application hang end-task error (0xCFFFFFFF) in the Windows firewall API library (FirewallAPI.dll), which occurs when the library is blocked on an advanced local procedure call (ALPC) port while attempting to diagnose a connection failure and retrieve information.
  • Cluster Sets: A couple of key functionalities to enable end-to-end testing of Cluster Sets scenarios are not present in this build.
  • Local vs. remote management: Some command-line tools and PowerShell modules may not be available for use locally on a Server Core installation. To remotely manage RS3 Server Core by using the full set of GUI tools, command-line tools, and PowerShell modules, download Remote Server Administration Tools (RSAT), available on the Windows Server Insider Preview download page.
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