[Bug 541937] [NEW] copying files to an usb pandrive is slow and slows down in time (Lucid Lynx)

[zvaral]

Public bug reported:

Copying files from an internal hard drive to an external USB pandrive is
slowing down during this process in Lucid Lynx alpha3 with all the
updates until now. Also note that the copying speed is well below the
standard rate for high-speed USB devices even in the initial state.

As a first look this phenomenon is independent of the filesystem of the
USB stick although some effect may be observed. I formatted it either
ext3, ntfs or vfat the result was the same. Copying starts around 20-30
MB/sec transfer speed and around 300 MB copied materials the process is
slowing down below 15 MB/sec and between 400-500 MB transfered data it
is below 10 MB/sec. Reaching the 1GB amount of copied data the speed is
only around 2 MB/sec. In case of using vfat file system the transfer
speed may go below the 1MB/sec transfer speed at this stage.

The number of the files I transfered from my hard drive to a 16GB USB
pandrive were 350 with a total size of 5.4GB.

In an other experiment (with ntfs usb partition) transferring only one
large file having a size of 2.7GB took more than a hour (0.7 MB/sec in
average)!

ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  zoli       1325 F.... pulseaudio
 /dev/snd/pcmC0D0p:   zoli       1325 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'IXP'/'ATI IXP rev 2 with ALC250 at 0xc0003400, irq 17'
   Mixer name	: 'Realtek ALC250 rev 2'
   Components	: 'AC97a:414c4752'
   Controls      : 33
   Simple ctrls  : 21
Card1.Amixer.info:
 Card hw:1 'Modem'/'ATI IXP Modem rev 2 at 0xc0003800, irq 17'
   Mixer name	: 'Silicon Laboratory Si3036,8 rev 15'
   Components	: 'AC97m:53494c2f'
   Controls      : 3
   Simple ctrls  : 3
Card1.Codecs.codec97.0.mc97.1.1:
 1-1/0: Silicon Laboratory Si3036,8 rev 15
 
 Extended modem ID: codec=1 LIN1
 Modem status     : GPIO MREF ADC1 DAC1 PRE(ADC2) PRF(DAC2) PRG(HADC) PRH(HDAC)
 Line1 rate       : 13714Hz
Date: Fri Mar 19 13:46:04 2010
DistroRelease: Ubuntu 10.04
HibernationDevice: RESUME=UUID=3ce2aaac-b25e-4863-91a2-0a57ade09901
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100224.1)
Lsusb:
 Bus 003 Device 003: ID 15d9:0a33 Dexon Mouse
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 018: ID 3538:0059 Power Quotient International Co., Ltd 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Acer, inc. Ferrari 4000
Package: linux-image-2.6.32-16-generic 2.6.32-16.25
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-16-generic root=UUID=4ceac70f-55c9-4a91-baae-aee960ec8114 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic
Regression: No
RelatedPackageVersions: linux-firmware 1.32
Reproducible: Yes
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
TestedUpstream: No
Uname: Linux 2.6.32-16-generic x86_64
dmi.bios.date: 03/20/06
dmi.bios.vendor: Acer
dmi.bios.version: 3A27
dmi.board.name: Ferrari IV
dmi.board.vendor: Acer, Inc.
dmi.board.version: Not Applicable
dmi.chassis.type: 1
dmi.chassis.vendor: , Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAcer:bvr3A27:bd03/20/06:svnAcer,inc.:pnFerrari4000:pvrNotApplicable:rvnAcer,Inc.:rnFerrariIV:rvrNotApplicable:cvn,Inc.:ct1:cvrN/A:
dmi.product.name: Ferrari 4000
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer, inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid needs-upstream-testing

-- 
copying files to an usb pandrive is slow and slows down in time (Lucid Lynx)
https://bugs.launchpad.net/bugs/541937
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