Public bug reported:
Low speed when transferring files over USB drive.
If the USB drive is not empty, the transferring speed is lower.
the bigger the file, the slower the speed.
here are my tests:
from HDD to USB (FAT):
1. 450 MB in 4 sec. (USB sitck EMPTY)
2. 450 MB in 52 sec. (USB stick not EMPTY)
3. 735 MB in 26 sec. (USB stick EMPTY)
4. 735 MB in 40 sec. (USB stick not EMPTY)
5. 735 MB in 3 sec. (after formatting USB stick)
6. 1,5 GB in 3min35 (USB sitck EMPTY)
7. 1,5 GB in 4min31 (USB stick not EMPTY)
from HDD to USB (ext4)
1. 450 MB in 1 sec. (USB sitck EMPTY)
2. 450 MB in 52 sec. (USB sitck not EMPTY)
3. 735 MB in 14 sec. (USB sitck EMPTY)
4. 735 MB in 1min (USB stick not EMPTY)
5. 735 MB in 16 sec. (after formatting USB stick)
5. 1,5 GB in 3min04 (USB sitck EMPTY)
6. 1,5 GB in 5min14 (USB stick not EMPTY)
from USB (FAT) to USB (FAT)
1. 735 MB in 10 sec. (USB sitck EMPTY)
2. 735 MB in 4min (USB stick not EMPTY)
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
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: ALC269VB Analog [ALC269VB Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: aleksej 1843 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xdf000000 irq 49'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10ec0269,10431ba3,00100100
HDA:80862805,80860101,00100000'
Controls : 30
Simple ctrls : 14
Date: Tue Oct 16 18:46:30 2012
HibernationDevice: RESUME=UUID=89690659-5cf9-495f-9a95-8615f4f3b144
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: ASUSTeK Computer Inc. U36SD
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-32-generic
root=UUID=f15fe73f-5542-4724-969b-90222a5cc2e3 ro quiet splash
i915.i915_enable_rc6=1 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
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-05-15 (154 days ago)
dmi.bios.date: 07/12/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: U36SD.205
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: U36SD
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrU36SD.205:bd07/12/2011:svnASUSTeKComputerInc.:pnU36SD:pvr1.0:rvnASUSTeKComputerInc.:rnU36SD:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: U36SD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise running-unity staging
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https://bugs.launchpad.net/bugs/1067452
Title:
Low speed when transferring files over USB drive
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