Sometimes Attached Drives are no longer being fully recognized after a System Reboot

As the title says...

After a system reboot OMV sometimes does not FULLY recognize ALL of the connected drives, but misses one or more. Example here in the screenshots is that ALL shown as ONLINE in File Systems. However, unlike all the others, the one at the bottom (YELLOW) did not get fully 'auto mounted'. This causes its shared folder to be no longer available.

This happens randomly with my mix of SSD and SD drives that are attached via a powered USB3 hub to my RPI4.

I was wondering if there is any way to automatically 'push the drive mounting over the finish line'.

Any help would be greatly appreciated.

Zitat von chente

Review the way you provide power to your drives. Raspberry has limitations when it comes to powering multiple drives via USB simultaneously.

Thanks for your reply. As I wrote above, all drives are attached via a powered USB3 hub.

Maybe we can clarify one point: is OMV expected to always fully auto-mount drives that are connected via USB (assuming they are sufficiently 'self-powered'?

Thanks much Soma and chente ; this info helps a lot. And yes, the powered USB hub I use is what seems to be the 4/5 port version of the one you linked to.

Interestingly, I have only seen power draws between 4-8 watts with my SSD drives connected, while the power supply is spec'd for 3A @5V, which - in theory - should provide sufficient headroom.

I wonder if there is a list of confirmed working powered USB hubs I could check out.

TIA!

Zitat von chente

If we were talking about mechanical units, the critical point of energy consumption is when they start. At that precise moment they consume considerably more than during normal operation, generally more than double. On SSD drives it probably won't be as pronounced but there may also be some of this. Additionally, you could have looked at the consumption when the disks are not working, at that time it is also reduced. So that consumption that you have seen would not reflect the necessary energy supply when the disks are booting.

The only way to be sure is to look at the technical data sheet for each of the drives and check the power requirement during startup.

Understood and I concur.

I remember 'back in my 20-bay server' days with mechanical drives, I needed to have a staggered spin up, so the although beefy PSU could get the system off the ground.

I only measured with a Shelly plug that exhibits some latency and a lower sampling rate, but I thought since all my drives are non-mechanical and with measured max. power values only about half of the power supplies spec. I should be OK. As I said, I'd very open to trying a different hub and looking for recommendations.

FYI: I'll be giving this hub a try: https://www.amazon.com/TP-LINK…tronics%2C181&sr=1-1&th=1 Just placed my order. Keeping fingers crossed.

Zitat von waffles

FYI: I'll be giving this hub a try: https://www.amazon.com/TP-LINK…tronics%2C181&sr=1-1&th=1 Just placed my order. Keeping fingers crossed.

Update: the hub arrived. My initial testing looks promising. Thus far, in almost all reboot instances OMV did recognize and correctly mount all of the attached drives. This is good enough for me.

Thanks again, all for your help.