Public bug reported:
If i copy larger files with Ubuntu 12.04 to my USB drive then it gets
very slow in the progress. Under Ubuntu 10.10 i could copy more then 30
MB/s using USB 2.0 connector. If i remember correctly i had a similar
issue under Ubuntu 10.10 which also lead nautilus to crash quite often.
I could fix it with some setting (years ago, can't remember where) so
that every automatically mounted device was mounted synchronized, which
fixed the problem. Since i upgraded to Ubuntu 12.04 i have this problem
again. All drives will be mounted as async, which should not be an bad
idea in general, but if it is mounted that way the copying is delayed
and the transfer rate is usually at about 5 MB/s, even so it is the same
USB drive.
That the drive and USB port is bored and not used to full potential is
obvious if i copy two or more large files at once. Then the overall
transfer rate increases until the drive can't keep up any more due to
excessive seeking. Copying multiple files at once actually reaches up to
20 MB/s.
Since i work often with huge files this is somehow frustrating, since i
have to wait a long time until i can unplug the device.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-32-generic 3.2.0-32.51
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: HDA Generic [HDA Generic]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: tbn 1844 F.... pulseaudio
/dev/snd/controlC0: tbn 1844 F.... pulseaudio
/dev/snd/pcmC0D0p: tbn 1844 F...m pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not
found.
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf6110000 irq 44'
Mixer name : 'Realtek ID 887'
Components : 'HDA:10ec0887,1458a002,00100302'
Controls : 4
Simple ctrls : 3
Card1.Amixer.info:
Card hw:1 'NVidia'/'HDA NVidia at 0xf6080000 irq 17'
Mixer name : 'Nvidia GPU 16 HDMI/DP'
Components : 'HDA:10de0016,10de0101,00100100'
Controls : 24
Simple ctrls : 4
Date: Tue Oct 16 19:57:05 2012
HibernationDevice: RESUME=UUID=1c8cce9e-8b69-44ec-87fc-00fdfc4dc6a8
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64
(20120823.1)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-32-generic
root=UUID=37490999-186f-4d5a-a2e5-6a7da0126806 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-32-generic N/A
linux-backports-modules-3.2.0-32-generic N/A
linux-firmware 1.79.1
RfKill:
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/23/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F4
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: B75M-D3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF4:bd03/23/2012:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnB75M-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug precise staging
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https://bugs.launchpad.net/bugs/1067469
Title:
Copying to external USB drive is slow
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