Christopher M. Penalver, I tested 3.8-rc4 kernel → the problem persists
** Description changed: Low speed when transferring files over USB 2.0 and USB 3.0. Example USB flash devices with FAT that demonstrates this problem: ID 13fe:4100 Kingston Technology Company Inc. ID 090c:1000 Silicon Motion, Inc. - Taiwan (formerly Feiya Technology Corp.) 64MB QDI U2 DISK 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) 112.5 MB/s 2. 450 MB in 52 sec. (USB stick not EMPTY) 8.6 MB/s 3. 735 MB in 26 sec. (USB stick EMPTY) 28.2 MB/s 4. 735 MB in 40 sec. (USB stick not EMPTY) 18.3 MB/s 5. 735 MB in 3 sec. (after formatting USB stick) 245 MB/s 6. 1,5 GB in 3min35 (USB sitck EMPTY) 6.9 MB/s 7. 1,5 GB in 4min31 (USB stick not EMPTY) 5.5 MB/s from HDD to USB (ext4) 1. 450 MB in 1 sec. (USB sitck EMPTY) 450 MB/s 2. 450 MB in 52 sec. (USB sitck not EMPTY) 8.6 MB/s - 3. 735 MB in 14 sec. (USB sitck EMPTY) 12.2 MB/s + 3. 735 MB in 14 sec. (USB sitck EMPTY) 52.5 MB/s 4. 735 MB in 1min (USB stick not EMPTY) 12.25 MB/s 5. 735 MB in 16 sec. (after formatting USB stick) 45.9 MB/s 5. 1,5 GB in 3min04 (USB sitck EMPTY) 8.1 MB/s 6. 1,5 GB in 5min14 (USB stick not EMPTY) 4.7 MB/s from USB (FAT) to USB (FAT) 1. 735 MB in 10 sec. (USB sitck EMPTY) 73 MB/s 2. 735 MB in 4min (USB stick not EMPTY) 3.0 MB/s I tested the ext3 filesystem and I had the same results. This is not reproducible using USB external HDD with FAT: Bus 002 Device 003: ID 0766:0001 Jess-Link Products Co., Ltd 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. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1067452 Title: Low speed when transferring files over USB flash drives To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1067452/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
