Detach and attach write cache disk,TD drive letter changes.

First we should find out the previous drive letter id in other normal vdi . Then we can run the command line to change the id:

1. Open a command prompt and run the command “diskpart”,

2. On the diskpart command line and run list disk.

3. Select disk {writeCache disk}

4. “uniqueid disk ID=ID(the obvious ID in Golden Image)

5. Restart the target device.

---

Problem Cause

This target's write cache had been detached and re-attached, making the volume unique ID(BINARY_DATA of HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\??\Volume\{xxx}) of this target's write cache disk change to another data. When the Windows start on this target, the write cache disk will be recognize as a new disk, and Windows will assign a new letter to it.