Earlier today my desktop was suffering, it has two Western Digital 1TB disks (WDC WD10EXEX-60ZF5A0) and they were mostly at 100% in Task Manager. My system was crawling, the drives are mirrored, but I was still worried!
I ran “chkdsk /r” and rebooted at 10:00am…ten hours later my computer has risen from the ashes! Normal disk performance, baby!!!
Morale of the story? Be patient out there…happy computing.