Does anyone have experience with the OWC Mercury Elite-AL Pro Dual (Quad interface)? Mine is configured w/2x2TB drives in RAID1 as instructed in the manual. After running this way for a bit, I was curious how I would know if one of the drives failed. The manual indicates replacing a failed drive will be result in the mirror being automatically rebuilt but doesn't indicate how to detect a failed drive. After not finding anything in the manual or OWC FAQs, I contacted tech support. The rep indicated this unit had no indicator for a failed drive. That seems almost pointless for a RAID1. Essentially not knowing there's a problem until both drives fail?