Forgot to mention the Asustor is a replacement for a QNAP TS-451 we've been running mostly without incident with the original WD Reds in RAID 10 since early 2014 (we put a UPS on it, because it don't like power outs)
The Asustor is very competitive on spec/price to the newer QNAP models. Longevity factor remains to be seen. One thing that disappointed me about the Asustor is it doesn't support RAID bitmaps (which can accelerate recovery). The QNAP does support this.
EDITED: 8 Oct 2020 20:56 by DSMITHHFX