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by RandyOo
Mon Oct 19, 2020 7:55 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

USB hub reliability issues persist, despite my optimism after upgrading to the 5.x kernel tree. It seems that connecting a UAS-enabled SSD through the hub triggers the issue more frequently. @Jamesh, any news on this? Any way I can gather more data to help figure out what's happening here? root@rpi4...
by RandyOo
Tue Aug 18, 2020 2:25 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

on my RPi4B-2G am using self powered hubs ORICO P10-U3, and Anker AH232 connected to those are 16 self-powered USB3.0 HDDs with a few spare slots for more. also connected to the same RPi4B-2G is Elecom U2H-Z10SBK (USB2.0 10-port hub) where I can connect some self-powered USB2.0 HDDs so total of at ...
by RandyOo
Tue Aug 18, 2020 1:23 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

Anybody has other reliable powered hub other than the mentioned TP Link please? It is hard to get here. They all seem to be reliable after upgrading the kernel. Anker makes high quality devices, if you can find those in your market. And if not, I’d suggest going with a reputable brand—I have had so...
by RandyOo
Tue Aug 04, 2020 3:59 am
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

One month later, I remain unable to duplicate the hub reliability issue that encountered with regularity prior to upgrading the kernel. All three hubs that failed, as described in the initial post to this thread, have been working perfectly. If anyone is having any trouble with device disconnects, a...
by RandyOo
Wed Jul 22, 2020 2:48 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

Guys do you have any list of working HUBs that are 3.0 and do not bacfeed as those TP-Link UH700 and UH720? It would be nice to know which, if any, of the previously broken hubs now work. In my experience, all of them. Can’t speak to the backfeeding, but all the hubs that were previously unreliable...
by RandyOo
Mon Jul 20, 2020 11:05 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

I did promise an update, so here's a preliminary one. After a few days I got the same error using the original hub in the USB 2.0 ports. On the flipside, the drive that I connected directly to the USB 3.0 port worked perfectly fine, so that was great. That is, until I decided to change the USB hub ...
by RandyOo
Wed Jul 15, 2020 4:29 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

Thank you for the reply @ejolson and @RandyOo! @ejolson: Apologies if I'm overly inexperienced here, so correct me if I'm misreading this. The Pi itself is only powered by its own official PSU - the only connection between the hub and the Pi is via one of the RPi 4 USB ports. I take it that, by bac...
by RandyOo
Wed Jul 15, 2020 4:09 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

I also had been having these exact same errors - reset device, error tag #0 and then ending up in I/O errors. <snip> Is there any safe way for me to determine whether the drives would be safe to run straight from the Pi - or at least one of them? I don't mind the backup drive to be in an USB2 port ...
by RandyOo
Tue Jul 14, 2020 4:46 am
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

At this point, I feel pretty confident in asserting that the reliability issues that caused me to start this thread have been resolved by (inadvertently) upgrading to the 5.x kernel (5.4.49-v8+). It's been over 10 days of stress testing, with over 100TB of data passed through various USB hubs, as we...
by RandyOo
Fri Jul 03, 2020 4:49 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

@RandyOo I send the content of my 2 non system drives to /dev/null twice (about 8 hours) and the system did not crash, in fact it never crashed since I started using the tp-link hub, please note that I'm runing the 64bit raspberry OS, although that is beta, that might also have something to do with...
by RandyOo
Fri Jul 03, 2020 4:43 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

TL;DR - use a decent USB hub from a known good manufacturer, and a decent enclosure, also from a known good manufacturer. Known good manufacturers include: Startech.com, TP-Link, D-Link, Anker, Amazon basics. (The same applies to any system - not just the Raspberry Pi). That's not bad advice, but I...
by RandyOo
Fri Jun 26, 2020 4:10 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

Hi, I went to UH720 hub (https://www.tp-link.com/pl/home-networking/computer-accessory/uh720), and I changed the OS to raspbian OS 64 bit. The PI itself is powered from one of the hub's charging ports and is now booting from one of the 3 SSDs connected to the hub. After moving around 1.5TB of data ...
by RandyOo
Fri Jun 12, 2020 1:40 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

... But by Pi has been up for 3 days now, I've transferred over 300 GB of data and no errors. <snip> I still have no idea why two hubs with the same chipset behave so differently, but this one just seems to work. I've run zpool scrub yesterday, all clean. I've tested the raid array with some load, ...
by RandyOo
Tue Feb 04, 2020 5:25 am
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

I wonder if the disconnect could be an overheating problem with the VLI chip on the Pi which manages the USB. Have you tried cooling (maybe by placing the Pi vertically with a fan blowing on it) to see if all the problems just go away? Maybe the power-saving changes in the most recent firmware are ...
by RandyOo
Tue Feb 04, 2020 3:41 am
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

Have you tried using different / better adaptors? Different, yes. Out of quite a large number units (mine/friends/family) representing half dozen chipsets only 2 passed. Some DOA, some failed after few minutes. All working on USB2 or PC. Of course, bargain hunter that I am, there were finds that di...
by RandyOo
Mon Feb 03, 2020 6:56 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

I think I am seeing the same issue but with a USB3 NVMe enclosure instead of a hub. Similar errors in dmesg, intermittent failures after long periods. Did you happen to try disabling UAS, as suggested in the sticky that I referenced in my first post in this thread? What specific errors did you see ...
by RandyOo
Thu Jan 23, 2020 6:40 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

Has anyone made some headway on this issue? I'm also experiencing issues with an Amazon Basics USB 3.0 Powered hub. Original configuration was as follows RPi 4 / 4GB -> USB HUB USB HUB -> Disk1 USB HUB -> Disk2 I assume you had faults in the original config? Are you getting the same faults I had, i...
by RandyOo
Thu Dec 26, 2019 4:00 am
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 396
Views: 205058

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

How were you able to compile the ZFS kernel module? I'm trying to do the same, but there isn't a kernel-headers or kernel-source package I can find, and downloading the official raspberrypi kernel source and building it results in "gcc: error: unrecognized command line option ‘-mgeneral-regs-o...
by RandyOo
Fri Dec 20, 2019 10:01 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

I'll continue testing, and see if I can get the issue to surface with smartmontools uninstalled, and report back here. I've replicated the issue both with and without smartmontools, so that theory can be discarded. I've also seen it happen on the 32 bit kernel. usbquirks didn't help, either. I'm wi...
by RandyOo
Fri Dec 20, 2019 9:47 pm
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 396
Views: 205058

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

I will also attempt to test the 32-bit kernel to see if this issue is unique to 64-bit, but it could possibly be a few weeks before I can get to it. After four days of testing the USB port with the hub attached (by looping dd reads of disks), I've replicated the issue on the 32 bit kernel, so I gue...
by RandyOo
Sun Dec 15, 2019 5:59 am
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 396
Views: 205058

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

I'm currently testing a theory that the smartmontools package is triggering the error, but I can't declare it with any confidence until I've been able to test for several days, at least. I will also attempt to test the 32-bit kernel to see if this issue is unique to 64-bit, but it could possibly be...
by RandyOo
Fri Dec 13, 2019 3:44 pm
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 396
Views: 205058

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

I've just created a post that describes some problems I've been experiencing with USB hubs. I can't really say with any certainty if it's the 64 bit kernel, since I haven't really done any testing with the 32 bit kernel yet. If it's warranted, I'd be happy to oblige, as time permits. I've now seen ...
by RandyOo
Fri Dec 13, 2019 3:30 pm
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

The 64 bit kernel is still beta, so would be interested to know if you see the same problems with the 32bit kernel. Meanwhile, I'm trying to locate similar hubs so we can do some internal testing. Well, firstly, I've seen the issue with UAS disabled/USB storage quirks enabled, so that can also be r...
by RandyOo
Thu Dec 12, 2019 4:07 am
Forum: Troubleshooting
Topic: USB 3.0 hubs unreliable on Pi4
Replies: 84
Views: 16275

Re: USB 3.0 hubs unreliable on Pi4

I do not (yet) have a Pi4. On my Pi's (zero, 1B, 1B+ ,2B, 3B) its not a problem backfeeding power via the USB to my experience Provided your PSU this way in has enough umph, you can run the Pi off this power. Its best to use the dedicated OTG power port to avoid any sudden power loss if you need to...
by RandyOo
Fri Dec 06, 2019 5:59 pm
Forum: Advanced users
Topic: Pi4 64-bit raspbian kernel for testing - Focus on Pi4
Replies: 396
Views: 205058

Re: Pi4 64-bit raspbian kernel for testing - Focus on Pi4

While digging through /var/log/messages to collect error messages related to the USB hub/SCSI errors I've been experiencing, I've coming across many (hundreds of) instances of the following: [Mon Dec 2 13:00:42 2019] [drm:vc4_bo_create [vc4]] *ERROR* Failed to allocate from CMA: [Mon Dec 2 13:00:42...

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