Hyper-V: Converting a VHD to a VHDX

On Windows Server 2012 there’s a new virtual hard disk format with the extension “VHDX”.

As the Virtual PC Guy states in his blog:

There are a number of advantages to this format:

• Support for greater than 2TB disks
• Better performance for dynamic and differencing disks
• Better handling of different disk sector sizes
• And more…

How to convert?

• Either manually (using Hyper-V Manager)
• or via PowerShell, using the Convert-VHD command

Will the size of my files change?

Yes, the new .VHDX files will probably be slightly larger.

Here’s an example of a sample conversion:

Description	VHD size (KB)	VHDX size (KB)	Change
System drive	22,316,615	22,581,248	(+ 1%)
Data drive	3,138,364	3,248,128	(+ 3%)

System Error 67 when trying to map a WebDAV folder using NET USE on Windows Server

The Problem

On Windows Server, you get the following error message when trying to map a WebDAV folder (in this case: HiDrive's online storage) using NET USE <driveletter>: <URL>:

System error 67 has occurred.

The network name cannot be found.

The Solution

1. Add the Desktop Experience feature.
   This will install the required Web Client service.
   Note: Be aware this requires a restart.

FinalBuilder: Connecting to HiDrive via FTPS

The Problem

When trying to connect to STATOs HiDrive online storage via FTPs you might receive the following error message:

A fatal Server side SSL error occured: Bad Record MAC
Unable to connect to FTPS Server.
Error occured while enabling SSL/TLS on command channel

When trying to get the directory listing you get

RECEIVE: 501 PORT command denied (address mismatch).
Directory Listing failed. 501 PORT command denied (address mismatch).

The Solution

1. Make sure you are running the latest version of FinalBuilder.
2. In the FTPS Connect action, make sure to
   • uncheck TLS 1.1 and TLS 1.2
   • check Passive Mode.