How to mark a new disk as spare?

Replaced a drive in G-Tech Studio but can’t mark it as spare. How can I do this then perform a rebuild ? Thanks in advance.

Hi malisette,
to rebuild the raid in your G-Tech Studio, open the G Technology RAID configurator, open the tab “Physical Disk”. Here the replaced drive will most likely appear as “PassThru”. Here we need to change this to “Unconfigured”. Once this change is done, please click on the tab “Disk Array” and now you should be able to rebuild the Raid. Rebuilding a Raid will take approximately 2 hours per TB.