Lawrence_craig
Posts: 9
Joined: Wed Jul 17, 2019 9:15 am

Pi4 not seeing HDDs attached to HUB

Mon Sep 16, 2019 7:06 am

Hi all,

Probably a quick solve problem but cannot find anything on this issue.

My Pi4 recognises my 2 x HDDs when attached directly to the device.

However when I then connect them to a powered Hub, they are not recognised by the Pi.

The hub is USB 2.0 and a specific one for the Pi (made by PiHut).

DMSG identifies the hub but not the HDDs.

Any thoughts?

Thanks
Last edited by Lawrence_craig on Mon Sep 16, 2019 10:11 am, edited 1 time in total.

LTolledo
Posts: 2158
Joined: Sat Mar 17, 2018 7:29 am
Location: Anime Heartland

Re: Pi4 not seeing HDDs attached to HUB

Mon Sep 16, 2019 9:55 am

there are some USB3.0 hubs that dont work well with the RPi, you could have gotten the "unlucky" one.

could be a typo on your part
"...connect them to a powered HDD..."
should have been
"...connect them to a powered USB hub..."

are your HDDs self powered (12v) or bus powered?
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
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Lawrence_craig
Posts: 9
Joined: Wed Jul 17, 2019 9:15 am

Re: Pi4 not seeing HDDs attached to HUB

Mon Sep 16, 2019 10:12 am

Thanks for the reply.

I have edited my original post.

The USB hub is 2.0 and is powered. It’s one made for the Pi (all worked ok on Pi3B).

Atari2020
Posts: 43
Joined: Sun Sep 01, 2019 8:13 pm
Location: Vancouver

Re: Pi4 not seeing HDDs attached to HUB

Mon Sep 16, 2019 10:22 pm

Which ports are you using on the Pi 4 when you connect the HDDs? Have you used the drives on a Hub with a Pi 3?

Lawrence_craig
Posts: 9
Joined: Wed Jul 17, 2019 9:15 am

Re: Pi4 not seeing HDDs attached to HUB

Tue Sep 17, 2019 7:45 am

I have tried both the 2.0 and 3.0 ports on the Pi (and no other devices attached). Yes, it worked on the Pi3 no problem.

Lawrence_craig
Posts: 9
Joined: Wed Jul 17, 2019 9:15 am

Re: Pi4 not seeing HDDs attached to HUB

Tue Sep 17, 2019 10:18 am

Also, just to add, it's not just the HDDs that the Pi fails to see connected to the hub, it's also other things like a USB pen drive.

DMESG gives this:

Code: Select all

[    1.123167] usb 1-1: New USB device found, idVendor=2109, idProduct=3431, bcdDevice= 4.20
[    1.123182] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    1.123194] usb 1-1: Product: USB2.0 Hub
[    1.124735] hub 1-1:1.0: USB hub found
[    1.124995] hub 1-1:1.0: 4 ports detected
[    1.124735] hub 1-1:1.0: USB hub found
[    1.124995] hub 1-1:1.0: 4 ports detected
So it is seeing the hub, just nothing attached to it.

jdb
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 2161
Joined: Thu Jul 11, 2013 2:37 pm

Re: Pi4 not seeing HDDs attached to HUB

Tue Sep 17, 2019 10:57 am

Is it just a problem with this particular hub?
Do you have a different USB2.0 hub to test (with the pendrive, since that's a less demanding device in comparison to a HDD).
Rockets are loud.
https://astro-pi.org

Lawrence_craig
Posts: 9
Joined: Wed Jul 17, 2019 9:15 am

Re: Pi4 not seeing HDDs attached to HUB

Tue Sep 17, 2019 11:10 am

Strangely, I think it’s the USB Hub that has failed. I connected to another laptop and it isn’t recognising the usb devices either. Thanks for all the help anyway.

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