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Unraid NAS: USB-C SSD Not Recognized Without Reboot

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I’m currently using Unraid with the Unassigned Devices plugin to manage external drives. The NAS easily recognizes HDDs connected via USB-A immediately after plugging them in, but SSDs connected via USB-C are only recognized after rebooting the entire system.

Steps Taken:

Verified the SSD and USB-C cable are functioning correctly on other systems.

Ensured the Unassigned Devices plugin is updated to the latest version.

Checked Unraid logs for any errors or unrecognized device messages when plugging in the SSD via USB-C.

Issue Persistence:

USB-C SSDs remain unrecognized until a full reboot of the NAS.

USB-A HDDs work flawlessly without requiring a reboot.

Question:

Is there a way to fix this issue so USB-C SSDs are recognized immediately after being plugged in, without the need to reboot? Could it be related to driver support, power delivery differences between USB-A and USB-C, or a configuration setting in Unraid?

  • Community Expert

There's no setting for that, possibly chipset/USB controller related, post the diags after first connecting the device and then after a reboot when they are recognized.

  • Community Expert
Jan  4 16:25:54 SEXYBARD kernel: usb 2-2: USB disconnect, device number 2
Jan  4 16:25:56 SEXYBARD kernel: xhci_hcd 0000:00:0d.0: Unable to change power state from D3hot to D0, device inaccessible
Jan  4 16:25:56 SEXYBARD kernel: xhci_hcd 0000:00:0d.0: Unable to change power state from D3cold to D0, device inaccessible
Jan  4 16:25:56 SEXYBARD kernel: xhci_hcd 0000:00:0d.0: Controller not ready at resume -19
Jan  4 16:25:56 SEXYBARD kernel: xhci_hcd 0000:00:0d.0: PCI post-resume error -19!
Jan  4 16:25:56 SEXYBARD kernel: xhci_hcd 0000:00:0d.0: HC died; cleaning up

 

Device is not initializing correctly when hot plugged, you can try v7 since it uses a different USB driver with storage, if it supports UASP, and it may be different.

  • Author

thanks Jorge, I'm a bit of a noob when it comes to all this, could you specify what you mean by v7? Version 7? to update unraid?

  • Community Expert
3 minutes ago, ztatzu said:

thanks Jorge, I'm a bit of a noob when it comes to all this, could you specify what you mean by v7? Version 7? to update unraid?

Unraid v7 (which currently is in rc2 status).

  • Author

thank you kindly both of you, I'll try it out and see what happens.

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