Hi Hans, Tests are currently undergoing with drives operating in plain USB mass storage class. In a first time, I'm filling drives with data (uncontrolled corpus, just TBs that I have on hand). It looks like the drives with most usage history are the ones that drop most often. kernel: usb 3-4.1.1: reset SuperSpeed USB device number 6 using xhci_hcd kernel: usb 3-4.2.1: reset SuperSpeed USB device number 7 using xhci_hcd kernel: usb 3-4.3.1.1: reset SuperSpeed USB device number 13 using xhci_hcd kernel: usb 3-4.3.2.1: reset SuperSpeed USB device number 14 using xhci_hcd kernel: usb 3-4.4: reset SuperSpeed USB device number 8 using xhci_hcd kernel: usb 6-4.3.2.1: reset SuperSpeed USB device number 8 using xhci_hcd kernel: usb 6-4.3.3.1: reset SuperSpeed USB device number 9 using xhci_hcd kernel: usb 6-4.4.1: reset SuperSpeed USB device number 6 using xhci_hcd Will provide some more interesting/visual data later. I'm surprised that the message "reset SuperSpeed USB device ..." is displayed without prior information about why. Someone with more background could give hints? I took a look at the USB MSC code and have few questions / observations: - It looks like (haven't tested it yet) the CONFIG_DYNAMIC_DEBUG isn't used with the USB mass storage debugging infrastructure, please confirm? If unused, are we interested to have a patch that would go back to regular pr_debug() that can work with dynamic debugging? Because with several of these drives / lots of activity / occasional issues, it looks like it will be hard to catch (yes I can use usbmon). - It looks like there is no configurable timeout for USB MSC requests. Perhaps the device is not responding in time and this is why it's reset? Best regards, -- Jérôme On Mon, 13 Nov 2017 12:38:14 -0500 Jérôme Carretero <cJ-ko@xxxxxxxxxxx> wrote: > Hi Hans, > > On Mon, 13 Nov 2017 10:04:53 +0100 > Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > > > Hi, > > > > On 13-11-17 07:14, Jérôme Carretero wrote: > > > On Mon, 13 Nov 2017 07:01:30 +0300 > > > Andrey Astafyev <1@xxxxxxxxx> wrote: > > > > > >> 13.11.2017 00:42, Jérôme Carretero пишет: > > >>> Nov 12 16:20:59 Bidule kernel: sd 22:0:0:0: [sdaa] tag#2 > > >>> uas_eh_abort_handler 0 uas-tag 3 inflight: CMD OUT > > >>> [...] > > >>> Do you see such things? > > > > For my devices, adding US_FL_NO_ATA_1X to unusual_uas.h didn't > > > change anything, and while adding US_FL_IGNORE_UAS (using > > > quirks=0bc2:ab34:u,0bc2:ab38:u) there are still device resets, > > > but they cause shorter hangs in system activity (~1 second when > > > UAS was more like ~20). > > > > The errors you are seeing are write errors. If you're seeing these > > errors with both the usb-storage and uas drivers then there likely > > is something wrong with your setup / hardware. > > My latest drives are Seagate Backup+ Hub 8TB and have ~ 50 hours of > uptime. I have connected them to different controllers and they do the > same as the first generation of the same capacity from 2015. > > SMART says that everything is OK on these disks (I have another that > was RMA'ed and the symptoms of failure are something else), and if > there were USB errors, the messages wouldn't be at the higher SCSI > level, I guess I would see "xact failed" USB errors... no? > > > Does the drive in question use an external power-supply or is it > > USB bus-powered? If it is the latter then that is likely the > > problem. > > External power supply & ~2-ft cable provided by Seagate. > > > Anyways things I would check and try to swap are both the cable > > used, the power-supply used (if any), the USB-port used as well > > as trying the disk on a completely different computer. > > I did that. The same thing happens. > > > I've the feeling something is busted with your hardware, it > > could be the disk itself. Did you mention that this was the first > > release of a new higher capacity ? Those often have some kinks > > which are worked out in later revisions. > > No, that's about the 3rd release I think. > > > I really suspect this has to do with GC activity of these SMR drives, > as if the write activity is throttled or in more spaced bursts (same > USB-level intensity), then there is no problem. > > I will do longer tests and see if only some of them do that, after > they have been subjected to similar usage history. > > > Best regards, > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
