Hello. I had 2 Seagate HDD of 2 TB each. Using Windows Server 2012 I created a mirror for these 2 disk and enabled shadow copies. When the process finished HDD Sentinel informed that one of the disks had like 1000 errors so it must be changed. After breaking the mirror I restarted the PC and then.... The healthy HDD now says it only has 4GB of space, and I cannot create new partitions or even initialize the disk, it says I/O error!!