I managed to break a test VM in 10-15min with minimal Ubuntu installs 
(wily/xenial) by spamming wbadmin calls ( backing up only this single VM) in a 
loop.. using PowerShell to create and delete snapshots in a loop seems to have 
the same effect
However, after some time Hyper-V (and VSS) complained about broken writers and 
refused to backup any more VMs on the server until a VMM service restart..
In a normal environment the issue took weeks of regular daily backups to 
manifest...

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

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