apport information ** Attachment added: "Lspci.txt" https://bugs.launchpad.net/bugs/1242085/+attachment/3883797/+files/Lspci.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1242085 Title: Low write speed to USB disks - do something! Status in “linux” package in Ubuntu: Confirmed Bug description: Problem description: I noticed very very low write speed to USB disks, especially to the new ones with USB 3.0. The "Disks" tool shows write speed about 7 MB/s !!! After start benchmark this tool shows write speed about 17 MB/s but imidiatelly goes below 10 MB/s. Same low speed during copy e.g. 3GB file manually to USB 3.0 disk. There is no such problem with read or access speed, only write. Unbelievable !!! OS: Ubuntu 13.10 (64 bit mode). Kernel: 3.11.0-12-generic Disk: Kingston DT Ultimate G3 (32GB) Similar low write speed problem is for disks: - Seagate Expansion Portable Hard Drive 500GB (model inside ST500LT012-9WS142) - Verbatim Store 'n' Go SuperSpeed USB 3.0 Portable Hard Drive 500GB (model inside ST500LM0 12 HN-M500MB) I report this bug from PC, but the same bug is on my laptop Asus X55U. Even the write speed on my laptop is more important to me. What I found about this bug (VERY IMPORTANT NOTE): - In old realese 12.04 LTS disks works OK. - In 13.04 disks works faster than it is now in 13.10. - If disk is formatted as NTFS the write speed is the lowest. - If disk is formatted as EXT4 the speed is x2 better. - If disk is formatted as FAT32 is low too. - No matter if disk is connected via USB 2.0 or USB 3.0. The low write speed is always the same. - This problem doesn't exists in Windows (so this is no hardware or BIOS problem). - This problem doesn't exists in OpenSUSE (so this is no hardware or BIOS problem). - There is no such problem with read or access speed. Write only. - No matter if there is UEFI. Laptop Asus X55U has UEFI but PC has not. - Hardware - no matter (same is on laptop ASUS X55U, I report from my PC now) - No matter if Ubuntu is 32 or 64 bit mode. --- ApportVersion: 2.12.5-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: user-pc 1424 F.... pulseaudio /dev/snd/controlC0: user-pc 1424 F.... pulseaudio CurrentDmesg: [ 20.325188] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready [ 167.464491] systemd-hostnamed[2044]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname! [ 1467.583396] systemd-hostnamed[2164]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname! [ 5670.978467] systemd-hostnamed[2802]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname! DistroRelease: Ubuntu 13.10 HibernationDevice: RESUME=UUID=4b9c34cd-9ce1-4ac3-ac15-3801b2fcc06b InstallationDate: Installed on 2013-10-18 (1 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) IwConfig: eth0 no wireless extensions. eth1 no wireless extensions. lo no wireless extensions. MachineType: System manufacturer System Product Name MarkForUpload: True Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=2f9a3d14-fd4f-4d71-87d1-05e40c87052e ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3 RelatedPackageVersions: linux-restricted-modules-3.11.0-12-generic N/A linux-backports-modules-3.11.0-12-generic N/A linux-firmware 1.116 RfKill: Tags: saucy Uname: Linux 3.11.0-12-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 09/23/2005 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0519 dmi.board.name: P5WD2-Premium dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0519:bd09/23/2005:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WD2-Premium:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1242085/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
