The new driver for MCS, MCSIO v2, has been available since Citrix Virtual Apps and Desktop version 1903. However, two important performance counters "Cache memory used" and "Cache disk used" are missing in this new version to read out current values. In addition, the performance counter path has changed from \Citrix MCS Storage Driver to \Citrix MCS(*). Unfortunately, the currently used cache disk size can no longer be determined, but only the current size of the cache disk file (mcsdif.vhdx). I have developed a Powershell script that at least gives me a quick overview of the RAM and disk cache status.