I had opened a problem ticket with hanaro.eu and provided all information to fix the problem. Instead of frowarding to development they kept keeping me busy by providing screen shots. Afterwards they never responded anymore and ignore all mails asking for status updates.
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I received an identical error message when selecting over-provisioning after upgrading Samsung Magician from 126.96.36.1990 to 188.8.131.52. After opening a ticket at hanaro.eu I was asked for an additional screenshot of the error message that I had already provided so I lost some confidence and chose to perform some basic PD/PSI. They might have asked for the SM6 log instead. Even leaving the default log levels in place it seems quite useful. Mine was located at directory C:\Program Files (x86)\Samsung\Samsung Magician\Log\. For overprovisioning check for INFO and ERROR category of component BOVG (bovg.dll). As an example this was my failure. 07-10-2019 16:40:23 INFO OverProvisioning OverProvisioning::ShowView 1156 Enter Over Provisioning screen False 07-10-2019 16:40:23 INFO OverProvisioning OverProvisioning::RequestInfo 62 Getting configuration of Over Provisioning is started. 07-10-2019 16:40:23 INFO BOVG OverProvManager::AnalyzeVolume 150 AnalyzeVolume: Start 07-10-2019 16:40:23 INFO BOVG OverProvManager::AnalyzeVolume 161 AnalyzeVolume: GetDiskSize: done 07-10-2019 16:40:23 INFO BOVG BasePartitionWorker::FillDriveLabelAndPath 164 FillDriveLabelAndPath: For loop start 07-10-2019 16:40:24 INFO BOVG BasePartitionWorker::FillDriveLabelAndPath 247 FillDriveLabelAndPath: For loop end 07-10-2019 16:42:54 ERROR BOVG BasePartitionWorker::FindMinNewPartitionSize 681 FindMinNewPartitionSize: Failed to execute queries. Operation timed out. Microsoft DiskPart version 10.0.18995.1 Copyright (C) Microsoft Corporation. On computer: T430-20H1 Disk 0 is now the selected disk. Partition 9 is now the selected partition. There is no volume in focus. Select a volume and try again. 07-10-2019 16:42:54 ERROR BOVG BasePartitionWorker::AnalyzeVolume 128 AnalyzeVolume: Failed to FindMinNewPartitionSize. 07-10-2019 16:42:54 INFO BOVG OverProvManager::AnalyzeVolume 198 AnalyzeVolume: End 07-10-2019 16:42:54 ERROR OverPrivisioning OverProvisioning::RequestDone 138 Operation returned an error. 07-10-2019 16:42:54 INFO OverProvisioning OverProvisioning::RequestDone 189 Getting configuration of partition is completed. It could be circumvented by changing partition type GUID for some Linux partitions from 0fc63daf-8483-4772-8e79-3d69d8477de4 (Linux filesystem) and 0657fd6d-a4ab-43c4-84e5-0933c84b4f4f (Linux swap) to old style ebd0a0a2-b9e5-4433-87c0-68b6b72699c7 (Microsoft Basic data partition). Might be that SM6 can't handle the new GUIDs. Your cause might be totally different but the log might help as well.
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