To bring a basic volume back to a healthy state

1. Repair any disk or controller problems, and make sure that the disk is turned on, plugged in, and attached to the computer.
2. Use the Rescan command to rescan all the devices on the SCSI bus to bring the disk that the volume belongs to back online.

   Select Rescan from the Actions menu, or right-click the StorageAgent node in the tree view and select Rescan from the context menu. If you have a lot of devices on the computer's SCSI bus, the rescan of the bus may take some time.