I have a first version NanoPi M4 with a SATA hat, but I have never run any drives from the USB. Is there any way you could externally power those 2 HHD’s and see if it’s a power issue?
BTW: This is an excellent SBC machine. It does become a little pricey when you add the heat sync, 4-port SATA hat, and dedicated 12V. power supply. It is my backup server and has been running continuously for 2 years.
Great point...Externally powering HDD testing is underway ...I will report back in a few days.
BTW: I agree, find that little SBC very solid...OMV5 is rock stable on it...running 24/7 as a 8Tb media server with 4x2Tb HDD on the SataHat....personally, I am satisfied (or if you prefer, worth the extra cost). The Sata controller runs a bit warm, so just to be safe, I added a micro fan driven at min low speed by the mainboard... the HDD are also mounded in a way to allow plenty of natural air convection. The HDD on the USB3 ports of the mainboard is used to back up my personal data with Rsyn and repository for OS image backup for other devices running on my network. I am presently experimenting BorgBackup to replace Rsyn. Lastly, this SBC has plenty of capacity left...