Hi there, I have 9 SYBA 8-bay hard drive docks with HDDs and want to attach them to Unraid via USB 3.0. I have a PCI-E Card with USB 3.0 ports however when I attach the 7 SYBA bays, only 2, i.e. 16 drives get recognized. When I unplug them and replug them 2 at a time, all drives are recognized. Conscious of USB 3 bandwidth limitations, I was still hoping the drives would show up and work, with all this PR around 127 devices etc..

 

Doesn't seem to work. Should I try with USB 2.0 as I know that was less restrictive but of course much slower? 

 

A bit clueless, to be honest... Appreciate anyone's ideas.

The problem is usually the USB bridges detecting the disks with the same identifiers, Unraid requires unique identifiers for each device.

Thanks for the quick reply. I concur, I had that issue with Terramaster enclosures and also others. However with Syba, they pass through each drive "as is", i.e. I can even see the serial number of each single drive in Unraid... So I don't think that's the problem...

You can post the diags when it's not detecting some in case something is visible.

sure thing, here comes! All 72 drives connected, however not all showing up. Tried a mix of powered USB 3.2 hubs, unpowered USB 2.0 hubs, and daisychaining the hubs as I read somewhere that could help...

 

Appreciate your views or feedback from anyone really who has more than 30 USB hard drives attached to their NAS.

 

super-diagnostics-20231122-1900.zip

Nov 22 06:52:01 super kernel: xhci_hcd 0000:03:00.0: Error while assigning device slot ID: No Slots Available Error
Nov 22 06:52:01 super kernel: xhci_hcd 0000:03:00.0: Max number of devices this xHCI host supports is 32.

This may be at least part of the problem, you may need more USB controllers.