The vendor has published 1 unique mention(s) for this bug: 1. MCS VDAs using MCSIO and Citrix Provisioning VDAs sometimes become unregistered due to hangs processing disk requests from windows when Asynchronous IO is enabled in MCSIO or the PVS vDisk. The fix forces synchronous handling of some requests even when Asynchronous IO is enabled. Latest urls for this bug: 1. https://docs.citrix.com//en-us/provisioning/current-release/whats-new/fixed-issues