Very old WD ex2 NAS still in use, now with F2-223.
WD NAS has good simple features like sleep mode and hibernation. In sleep mode, WD power light (blue light bigger than Terra) will be in slow blinking, which is good to differential sleep mode and normal mode (stayed on without blinking.)
Terra NAS power light is always staying on and there is no way to tell Terra is in sleep mode or normal mode.
(Other issue: Casing fan is always on at about 1300 rpm and working as an exhaust fan, Is it correct that it is an exhaust fan, sucking air from front and blowing air out at fan casing !!
"strangely" Terra help P2P confirming it is an exhaust fan but NOT a fan in "pressurizing" mode. (Did open casing and seen 2 red marks at top position (casing normal sitting position) at the connector.
My understanding is blowing air in the casing will produce turbulent air for "better" distributed air cooling, rather than sucking air from front face of casing.
Did observe my Kingston NVME PCEI gen 4 1T (data volume, Terra speed test at about 750GB/s) was operating at 67C by the overall view screen. A simple question: What Terra fan functionality that it should be?? Thanks.)