Scenario:
While updating the XenServer tools of the vDisk on the master target device, a Citrix Administrator
receives the following error:
STOP: 0x0000007B
How should the administrator update the master target device and vDisk created from that device?

A.
Perform a Reverse image.
B.
Restart the Stream service.
C.
Downgrade the XenServer tools.
D.
Change the write cache location to cache on server.
I think you’d have to reverse image it, the same way you would when you need to upgrade PVS.
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(if the Master Target Device’s hard drive no longer exists, you can perform a reverse image
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https://support.citrix.com/article/CTX118263
Reverse Image
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