Hi, I just had a case with a customer where, in the Win 11 VDI environment, the cache disk on all workers was completely full within a few minutes. The cause seems to be the scheduled task for defragmentation. It runs once a week and, in our case, it was exactly one week after creating the new image and sealing it with BISF. This has never happened to me before, and I could swear that the task is disabled by default in the Citrix Optimizer. But that's not the case. Has anyone else noticed this, or do you explicitly select the task in the Optimizer?

thanks I will look at this in my environment

In my case (also BISF) it was the ngen.exe which starts when system is idle. All ngens run while sealing. Dont have acess now, but solution was to disable the seconds step in the bisf ngen policy.

Ah thanks for the input, i'll have a look on that too. Might be the case for us as well since the environment is still not fully productive and systems are mostly idle!