I’ve purchased two of the latest WD Red 2TB drives (WD20EFAX) on Amazon for my personal cloud at home. I’m running Ubuntu Server 20.04 LTS on my Raspberry Pi 4 4GB. I’m using SATA to USB adapters with power supply to power the HDDs and establish the connection with the Pi. I’ve tried two different brands for such cables: Inateck and Benfei.
The problem: If only one single drive is connected everything seems fine. It spinns and is mounted properly for multiple consecutive days in a row. Until I connect the second drive (The order is not relevant, both drives have that problem): One of them frequently stops spinning and boots up again a second after. The affected drive is therefore not mounted to the filesystem anymore. I suspect that both drives still drain power from the Pi’s USB ports rather than the SATA power supply adapters. The Pi is probably unable to power both drives simultaneously which results in one of them losing power.
I’ve contacted the WD Live Chat support. The friendly person I talked to said that WD Red drives support being powered by such adapters. He/She adviced me to replacing both drives. I highly doubt that both drives are defect, as both are brand new (so are the adapters). It seems very unlikely to me. I’m having this problem for a while now and it really gives me headaches. That’s why I decided to start a new discussion topic in this forum. If there’s anyone who can tell me whether WD Red NAS drives support this setup or can suggest a solution to this problem I would be very grateful!