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Add New Disk: 2nd 3TB visible as 746.5 GB

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I installed 2 identical Seagate 3TB disks on Windows 8.1, Dell Studio XPS 435T/9000. Apparently my PC doesn't support this capacity. I ran the free Seagate DiscWizard (an Acronis product), which asked me to manually install VirtualDiskSetup from Acronis site. I did and it fortunately recognized one of the disks as 3 TB.

I figured out that I should try the proper Acronis product at set up the backups. I installed True Image trial, launched "Add New Disk", but as you can see from the attached images, only 1 of the 2 identical Seagate disks shows up as 3 TB.

I ran VirtualDiskSetup again, chose "Repair", relaunched Add New Disk. Now it recognized the 2nd disk as 3TB, but when I chose to initialize it, I got a blue screen of death with a crash in vidsflt.sys. On reboot this 2nd disk was back to 746.5 GB.

Thank you!

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If within 30 days of purchase, you need to get direct support from Acronis. Serial numbers need to be registered in your personal Acronis Account and then contact Live Chat. Help along the left margin and start with support link in upper right corner of this website.

I think you should be using Windows Disk Management to add these drives to your machine not Acronis. Your screenshots show that you have 3 Primary Master disks installed. Primary Master partitions are where an system OS is installed. Your remaining partitions or disks can be Primary but should not be Primary Master.