Same problem here using 16.04 / kernel 4.4.0-42-generic (i686) and external drive LaCie d2 Quadra, USB ID 059f:105e
I get random hangs under heavy traffic, during rsync from one external USB drive to another. rsync just hangs during a transfer. Sometimes it recovers after a number of seconds, sometimes it never does and hangs there, possibly for hours. dmesg contains then contains repeated error recovery sequences such as: [ 2350.056247] usb 1-4.4: cmd cmplt err -2 [ 2350.128049] usb 1-4.4: reset high-speed USB device number 12 using ehci-pci [ 2350.333548] scsi host8: uas_eh_bus_reset_handler success [ 2381.032039] sd 8:0:0:0: [sdc] tag#1 uas_eh_abort_handler 0 uas-tag 2 inflight: CMD [ 2381.032045] sd 8:0:0:0: [sdc] tag#1 CDB: Read(10) 28 00 95 5a 11 00 00 00 08 00 [ 2381.032049] sd 8:0:0:0: [sdc] tag#0 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD [ 2381.032052] sd 8:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 20 00 [ 2381.032079] scsi host8: uas_eh_bus_reset_handler start Disabling uas worked the problem around. I still see some: usb 1-4.4: reset high-speed USB device number 14 using ehci-pci in dmesg but the disk recovers after the reset. Additionally, disabling uas allows me to see the external disk SMART data (including using Disks), something I couldn't do before and was sorely missing in these circumstances! The bottom line is that it seems under certain circumstances, uas is not able to recover from errors. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1584557 Title: Seagate external drive causes SCSI bus resets when UAS enabled Status in linux package in Ubuntu: Confirmed Bug description: Seagate STEA1000400 external USB hard disk (USB ID 0bc2:2322) causes continuous SCSI bus resets by default. As a workaround, disabling UAS causes the device to work fine. To disable UAS, I created a file in /etc/modprobe.d with the following contents: options usb-storage quirks=0bc2:02322:u ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubuntu-release-upgrader-core 1:16.04.14 ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8 Uname: Linux 4.4.0-22-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CrashDB: ubuntu Date: Sun May 22 22:02:26 2016 InstallationDate: Installed on 2012-10-07 (1323 days ago) InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120822.4) PackageArchitecture: all ProcEnviron: LANGUAGE= TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: ubuntu-release-upgrader Symptom: ubuntu-release-upgrader UpgradeStatus: Upgraded to xenial on 2016-04-09 (43 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584557/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
