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[mrDoctorWho <1213095@xxxxxxxxxxxxxxxxxx>]

3.3 — not tested
3.4.0-030400-generic — fine: 
$ dd if=/dev/zero of=/tmp/1
^C4278817+0 записей получено
4278817+0 записей отправлено
скопировано 2190754304 байта (2,2 GB), 21,8368 c, 100 MB/c
3.4.5 — slow speed
3.4.10 — slow speed
3.4.20 — slow speed
3.4.58 — slow speed

** Attachment added: "full test log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1213095/+attachment/3778321/+files/log.txt

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1213095

Title:
   Too slow speed of storage devices (HDDs, flash-drives, etc) after
  booted up

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  After Ubuntu 12.04 booted up all data-storage devices are working too slow. I tested lastest and oldest kernels and all is ok OLNY on 3.2 kernel. I can't use 12.04 with 3.2 kernel because my ethernet card won't work here. I also TRIED ubuntu 13.04 (LiveCD) and results are the same. Here a simple example test by DD:
  Kernel 3.2.37:
  $ dd if=/dev/zero of=/tmp/1
  ^C2694838+0 recieved
  2694838+0 sent
  copied 1379757056 bytes (1,4 GB), 13,2817 sec, 104 MB/c

  Kernel 3.9.11:
  $ dd if=/dev/zero of=/tmp/1
  ^C6721+0 recieved
  6721+0 sent
  copied 3441152 bytes (3,4 MB), 12,56 sec, 274 kB/c

  ALL storage devices working like that, all are slowest. /tmp is not
  mounted anywhere (mean it's all by default). But in Windows all is ok.

  My friend reported bug #1213075 for me.

  --- Apport from 12.04.2 (kernel 3.9)
  ApportVersion: 2.0.1-0ubuntu17.4
  Architecture: i386
  DistroRelease: Ubuntu 12.04
  InstallationMedia: Xubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=ru:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=ru_RU.UTF-8
   SHELL=/bin/bash
  Tags:  precise
  Uname: Linux 3.9.11-030911-generic i686
  UnreportableReason: Этот пакет не является официальным пакетом Ubuntu. Пожалуйста, удалите все сторонние пакеты и попробуйте снова.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
  --- Apport from 13.04 (kernel 3.5). Added because apport won't post system info at 3.9 kernel
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu-gnome   3434 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu-gnome   3434 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  CasperVersion: 1.331
  DistroRelease: Ubuntu 13.04
  IwConfig:
   lo        no wireless extensions.

   eth0      no wireless extensions.
  LiveMediaBuild: Ubuntu-GNOME 13.04 "Raring Ringtail" - Release i386 (20130424)
  MachineType: Gigabyte Technology Co., Ltd. Z87X-UD3H
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: initrd=/casper/initrd.lz file=/cdrom/preseed/username.seed boot=casper  quiet splash -- BOOT_IMAGE=/casper/vmlinuz
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
  RfKill:

  Tags:  raring
  Uname: Linux 3.8.0-19-generic i686
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 04/17/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F3
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: Z87X-UD3H-CF
  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.:bvrF3:bd04/17/2013:svnGigabyteTechnologyCo.,Ltd.:pnZ87X-UD3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ87X-UD3H-CF:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: Z87X-UD3H
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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