Support deprecation Learn about the features that are no longer supported in PowerFlex 3.5.1. DAS Cache DAS Cache is no longer supported for PowerFlex running on any operating systems. System Analysis Tool The System Analysis Tool is no longer included in PowerFlex. AMS Systems managed by AMS system will not be able to upgrade to PowerFlex v3.5 or later. Prior to performing an upgrade, contact PowerFlex Product Management for possible alternatives. NOTE: AMS artifacts will be removed from the support site. For guidance, contact PowerFlex Product Management. VxFlex OS GUI client The GUI from previous versions of this product is no longer supported. Deprecated operating systems For the most current information, see the Dell EMC Simple Support Matrix (ESSM) at https://elabnavigator.emc.com/eln/modernHomeSSM/. Parent topic PowerFlex 3.5.1 Release NotesRelease Notes for PowerFlex 3.5.1.