The Rescan command rescans the SCSI bus for disk changes. It also does the equivalent of the Refresh command, updating information on drive letter, file system, volume, and removable media.

It is recommended that you use Rescan every time you make disk changes, such as removing or adding a disk. Rescanning can take several minutes, depending on the number of devices on the SCSI bus.

From the toolbar, select Actions, then Rescan.

A progress bar showing the percentage of completion for the rescan process is available by clicking on the Tasks tab located in the lower pane. When Rescan is finished, you should see accurate information about your system.

If error flags remain, you may need to reactivate the disks or volumes.