G.W. Haywood writes:
Hi there,On Tue, 24 Mar 2020, deloptes wrote:Does someone has experience with USB3 disks - may be in raid1 on the Rpi4? I tried years ago with usb2 disks in raid1 and the results were miserable.A good point I missed. I should have said in my previous post that the USB interface devices that I used on the Pi 4B were both USB2 and USB3 varieties, and that there doesn't seem to be a difference in the reliability between the two. An addendum: the discs themselves were a selection ranging from 500GB WD and Seagate to 3TB HGST. I did try a couple of old 200GB Seagate drives but the Pi4B didn't recognize them on USB3 interfaces, I don't yet know why. Rebuilding 3TB filesystems gets old quickly, obviously I haven't even considered trying to build a RAID array with this rubbish. In short, still miserable.
From my experience, RAID1 on USB does not work reliably. See https://lists.debian.org/debian-user/2014/09/msg00602.html For NAS-style use cases, I consider single board computers to have an advantage mainly in terms of power consumption. In case one is going to run two (or even more?) rotating disks in conjunction with such a board, from my point of view, power consumption raises significantly making the use of an energy efficient "regular" system a viable alternative to consider. YMMV Linux-Fan
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