@scotthouston_ The G-Raid w/TB Gen1 was designed around Apples software RAID feature, the drive is not supported under OS El Capitan
@ModernArtPics glad to hear you got the issue resolved, contact us again if you have further questions. have a great day
@PatBravo4 The XL units are hardware raid, you will need a G-Speed eS or eS Pro in order to raid two units together
@adrianpelletier Please call us 1-888-426-5214 so we can help troubleshoot over the phone.