FWIW, I changed my notebook and reinstalled 18.04.2 64-bit on the new machine. I then plugged my 4 external disks (see comment #6) to the new machine. And much to my dismay, when plugged into USB 3.x ports, the disks didn't mount... It did on USB 2.0 ports, though.
Looking at sysdev reminded me of this problem I had experienced in 2016 on the same devices, and the same fix worked just as well: - Creating a "blacklist-uas-on-quirks.conf" in /etc/modprobe.d and - Adding the line options usb-storage quirks=059f:105e:u,059f:107e:u in the file to blacklist uas for the two listed devices and use usb-storage instead. That fixed it for me. -- 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
