Comment 6 for bug 1792045

All of the tested disks use ext4.

On Fri, Sep 14, 2018 at 4:11 AM Kai-Heng Feng <email address hidden>
wrote:

> What filesystem does the external disk use?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1792045
>
> Title:
> Ubuntu 18.04 external USB hard drive performance 1/10th of 16.04
>
> Status in linux package in Ubuntu:
> Confirmed
>
> Bug description:
> I cannot get my external 8TB sata hard drive (attached via USB 3) to
> write faster than about 10 megabytes per second under Ubuntu 18.04. I
> have another that writes at the expected full speed or close enough
> (100+ MBps).
>
> I have tried:
>
> * Changing the enclosure from the stock to a new one
> * Using usb-storage "quirks" options in modprobe conf files to work
> around any UAS incompatibilities with the bridge (many reports of the drive
> working at full performance when disabling UAS, no such luck for me)
> * Checking the disk for errors
> * Updating the kernel to the most recent mainline (4.18.6 at the time)
> * Checking UEFI settings (I'm already on the most recent revision of the
> firmware)
> * Applying all available updates
> * Changing USB ports
> * Checking dmesg for any obvious errors (dead end, I googled everything)
>
> Again, a different external 3TB USB 3 drive does not have any write
> speed issues at all, so it's not the computer (Intel NUC7PJYH).
>
> However, the very same drive in both of the enclosures I have used
> works *perfectly* in Ubuntu 16.04 on kernel 4.15.0-34 in both a live
> session and installed. I am not sure what the difference is between
> the two LTS versions that is causing this, but unfortunately I think
> I've reached the end of my know-how on this.
>
> Thank you for your time, and please let me know what other information
> I can provide.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 18.04
> Package: linux-image-4.15.0-33-generic 4.15.0-33.36
> ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
> Uname: Linux 4.15.0-33-generic x86_64
> ApportVersion: 2.20.9-0ubuntu7.3
> Architecture: amd64
> AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path',
> '/dev/snd/hwC0D0', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c',
> '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq',
> '/dev/snd/timer'] failed with exit code 1:
> CurrentDesktop: XFCE
> Date: Tue Sep 11 18:33:46 2018
> InstallationDate: Installed on 2018-09-06 (4 days ago)
> InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
> (20180725)
> Lsusb:
> Bus 002 Device 002: ID 174c:55aa ASMedia Technology Inc. ASM1051E SATA
> 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge
> Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 001 Device 003: ID 8087:0aaa Intel Corp.
> Bus 001 Device 002: ID 1997:2433
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> MachineType: Intel Corporation NUC7PJYH
> ProcEnviron:
> TERM=xterm-256color
> PATH=(custom, no user)
> LANG=en_US.UTF-8
> SHELL=/bin/bash
> ProcFB:
>
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-33-generic
> root=UUID=b40fd1a1-0de5-40bb-b598-7f4cd53daee1 ro quiet splash vt.handoff=1
> PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
> PulseAudio daemon running, or not running as session daemon.
> RelatedPackageVersions:
> linux-restricted-modules-4.15.0-33-generic N/A
> linux-backports-modules-4.15.0-33-generic N/A
> linux-firmware 1.173.1
> SourcePackage: linux
> UpgradeStatus: No upgrade log present (probably fresh install)
> WifiSyslog:
>
> dmi.bios.date: 08/21/2018
> dmi.bios.vendor: Intel Corp.
> dmi.bios.version: JYGLKCPX.86A.0044.2018.0821.1915
> dmi.board.name: NUC7JYB
> dmi.board.vendor: Intel Corporation
> dmi.board.version: J67969-401
> dmi.chassis.type: 35
> dmi.chassis.vendor: Intel Corporation
> dmi.chassis.version: 2.0
> dmi.modalias:
> dmi:bvnIntelCorp.:bvrJYGLKCPX.86A.0044.2018.0821.1915:bd08/21/2018:svnIntelCorporation:pnNUC7PJYH:pvrJ67992-401:rvnIntelCorporation:rnNUC7JYB:rvrJ67969-401:cvnIntelCorporation:ct35:cvr2.0:
> dmi.product.family: Intel NUC
> dmi.product.name: NUC7PJYH
> dmi.product.version: J67992-401
> dmi.sys.vendor: Intel Corporation
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1792045/+subscriptions
>