The Volume System Reserved Was Not Optimised – SSD Disks On Windows 8 Posted on by Webmaster IT Support Forum › Forums › Windows › Windows 8 › Troubleshooting › The Volume System Reserved Was Not Optimised – SSD Disks On Windows 8 Tagged: 0x80070057, Defrag, SSD This topic contains 0 replies, has 1 voice, and was last updated by Webmaster 3 years, 2 months ago. Author Posts June 7, 2016 at 11:10 am #1879 WebmasterKeymaster When you have an SSD System disk, you will get the following error logged in your Event Log: The volume System Reserved was not optimised because an error was encountered: The parameter is incorrect. (0x80070057) Source: Microsoft-Windows-Defrag Event ID: 257 This is because Windows 8 and above does not optimise or defrag SSD disks. This is because SSD disks only have so many writes per block and defragging / optimising unnecessarily uses these writes. Really, the volume System Reserved was not optimised error should be removed from the event log if the system disk is an SSD, because it’s just not relevant. Microsoft are yet to do this 🙁 Author Posts You must be logged in to reply to this topic.