While in Seattle for TR 10 I had an opportunity to meet up with an innovative startup called VMUtil.com (www.vmutil.com). Led by a Microsoft File System / Storage MVP, they have come up with some excellent tools to make Hyper-V more efficient with non-SAN storage solutions and add value when SAN storage is used. This blog will cover one tool VHDCopy which can optimize fixed size VHD file copies and its sister tool, VHDCopy Enterprise Edition aka VHDCopEE. I found these tools of special interest because they resolved an existing issue I was having in a large hyper-v environment.
Hyper-V VHD files tend to be very large for a number of reasons:
The net result is that a typical VHD will be fairly large but will contain a large area of free space as seen by the NTFS file system within the VHD file.
Imagine you are copying a 80GB VHD file, with NTFS inside the VHD believing it has an 80GB VHD file with 60GB free.
Possible use cases for VHDCopy and VHDCopEE
Please contact firstname.lastname@example.org for pricing and licensing.
VHDCopy is priced per physical server and is available for Windows Storage Server, Windows Server 2008, and Windows Server 2008 R2. Windows Storage Server uses fixed size VHDs to implement the iSCSI LUNs. VHDCopy can push a VHD file from a local volume to a network volume, or pull a file from a network volume to a local volume. VHDCopy does not support CSV volumes
VHDCopEE Enterprise Edition is also priced per physical server and is available for Windows Server 2008 R2 only. VHDCopEE can pull a volume from a network volume to a local volume or a CSV volume. VHDCopEE can also push a VHD file from a local volume or CSV volume to a network volume. The CSV can be in direct access mode or in redirected access mode.