Friday, 11 January 2013

Hyper-V: Creating a Fixed VHDX on 8x RAID 6 10K SAS Spindle Set: 130GB

Our previous blog posts on this subject:

For today’s test we are running the following setup:

  • Intel Server System R2208GZ4GC
    • Dual Xeon E5-2630
    • 128GB (16x 8GB) Kingston ECC
    • Intel Integrated RAID RMS25CB080 with BBU
    • 8x 600GB Seagate 10K SAS drives at 2.5”

The operating system is a freshly installed Windows Server 2012 Standard.

The RAID 6 array setup in the RAID controller’s BIOS is as follows:

  • Logical/Virtual Disk 0: 120GB
  • Logical/Virtual Disk 1: 3.1TB

We start the New Virtual Hard Disk Wizard in Hyper-V Manager and run through to create a fixed VHDX with a 130GB size.


Our test results are:

  • Start time: 13:29
  • End time: 13:31
    • image
  • Result: 2 Minutes

Yup. 2 Minutes.

As a just-in-case we ran this test again this time while watching the Performance Monitor:


  • Start: 13:37
  • Finish: 13:39
  • Disk Queue Length:
    • image
  • Disk Throughput:
    • image
  • All three measures:
    • imageimageimage
  • Result #2: 2 Minutes

Check out that throughput at 1GB/Second! And, Disk Queue Length hovering around 5 for the working virtual/logical disk.

This test demonstrates that a properly configured disk subsystem will perform as good or better than expected.

Now on to the SSD tests! :)

Philip Elder
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book

Windows Live Writer


Anonymous said...

You're not comparing apples to apples. This machine has 96 GB of RAM and the previous had far less along with no BBU which translates to a far less capable cache. It not just the disk subsystem that provides the edge here, but other factors as well.

Philip Elder SBS MVP said...

Yes and no.

We have a number of different disk sets we have set up in this box to compare. Intel SSDs and Seagate 15K.2 (3Gbit) SAS spindle set.

The results were actually quite surprising.