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4 TB drive on older MSI system upgraded to Win 10
Processing: DxDiag.txt… Si
System Model: P67A-C43
System Type: x64-based PC
Processor(s): 1 Processor(s) Installed.
[01]: Intel64 Family 6 Model 42 Stepping 7 GenuineIntel ~1600 Mhz
BIOS Version: American Megatrends Inc. V1.28B8, 12/28/2011

found the drive and system auto divided it
simple partition
only does about 1/2 of drive and I cannot seem to make the other half active

any help would be great

Hi,

I request you to test the drive health status through Western Digital Dashboard and share the test results with us.

Title: Testing a drive for problems using The Western Digital Dashboard

Link: [Testing a drive for problems using Western Digital Dashboard]