Thanks for your response. You were right it was spun down - but was not able to spin-up the drive using the icon on the Main screen. As I shutdown Unraid I noticed the power light on one of the the Icy Box IB-565SSK 5-Bay storage unit was not on. I switched it on and attempted to restart Unraid. It took considerably longer to get to the 192.168.1.23 and the log in prompt on the Unraid monitor. I was unable to connect to Unraid from another port on the network using 192.168.1.23 in the browser address bar - gave the message - cannot connect.
After trying to reboot several times i eventually was able to login to Unraid - did not change anything just performed several reboots. After logging in all the drives were accessible and the preclear problem disappeared. Looks like a hardware problem? Could one of the drives be faulty?
