And the output of the speed test

Linux adrian-PC 3.2.0-2-amd64 #1 SMP Tue Mar 20 18:36:37 UTC 2012 x86_64
GNU/Linux

writing:
1024+0 registros leídos
1024+0 registros escritos
102400000 bytes (102 MB) copiados, 0,315309 s, 325 MB/s
./script: línea 22: /proc/sys/vm/drop_caches: Permiso denegado

reading:
1024+0 registros leídos
1024+0 registros escritos
102400000 bytes (102 MB) copiados, 0,0303001 s, 3,4 GB/s

Anyway, I'll test it under Windows

2012/4/2 Dmole <email address hidden>

> USB 1 is 001.5 MB/s
> USB 2 is 060.0 MB/s
> USB 3 is 625.0 MB/s
>
> adri58 is getting 5.3 MB/s, I would bet that is the max speed of his
> device.
> But if not please post the output of a disk speed testing tool from some
> other OS.
>
> Speed tests showing how slow flash drives are:
>
>
>
> ---------------------------------------------------------------------------------------------------------------------------
> --flash fat32 drive
>
> Darwin imac 11.3.0 Darwin Kernel Version 11.3.0: Thu Jan 12 18:47:41 PST
> 2012; root:xnu-1699.24.23~1/RELEASE_X86_64 x86_64
>
> writing:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes transferred in 32.315127 secs (3168795 bytes/sec)
>
> reading:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes transferred in 3.597781 secs (28461989 bytes/sec)
>
>
> ---------------------------------------------------------------------------------------------------------------------------
> --flash fat32 drive
>
> Linux ubuntu 3.2.0-20-generic-pae #33-Ubuntu SMP Tue Mar 27 17:05:18 UTC
> 2012 i686 i686 i386 GNU/Linux
>
> writing:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes (102 MB) copied, 47.9621 s, 2.1 MB/s
>
> reading:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes (102 MB) copied, 3.9149 s, 26.2 MB/s
>
>
> ---------------------------------------------------------------------------------------------------------------------------
> --sata ext4 drive
>
> Linux ubuntu 2.6.32-39-generic #86-Ubuntu SMP Mon Feb 13 21:47:32 UTC
> 2012 i686 GNU/Linux
>
> writing:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes (102 MB) copied, 0.759231 s, 135 MB/s
>
> reading:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes (102 MB) copied, 1.74171 s, 58.8 MB/s
>
>
>
> ---------------------------------------------------------------------------------------------------------------------------
> --usb ntfs drive
>
> Linux ubuntu 2.6.32-39-generic #86-Ubuntu SMP Mon Feb 13 21:47:32 UTC
> 2012 i686 GNU/Linux
>
> writing:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes (102 MB) copied, 3.08867 s, 33.2 MB/s
>
> reading:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes (102 MB) copied, 3.27496 s, 31.3 MB/s
>
>
> ---------------------------------------------------------------------------------------------------------------------------
> --3 usb lvm dm_crypt ext4 drives (dm_crypt is messing with the write speed
> here)
>
> Linux ubuntu 2.6.32-39-generic #86-Ubuntu SMP Mon Feb 13 21:47:32 UTC
> 2012 i686 GNU/Linux
>
> writing:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes (102 MB) copied, 0.463585 s, 221 MB/s
>
> reading:
> 1024+0 records in
> 1024+0 records out
> 102400000 bytes (102 MB) copied, 3.04551 s, 33.6 MB/s
>
>
>
> ---------------------------------------------------------------------------------------------------------------------------
> --the test used:
>
> #!/bin/bash
>
> #
> # test_drive_speed.sh
> #
>
> OUT=./file1G.tmp
> uname -a
> echo "spin you right round" >$OUT;
> sleep 1
> echo -e "\nwriting:"
> if [ "$1" == "-u" ]; then
>        dd if=/dev/urandom of=/dev/shm/$OUT bs=100000 count=1024 >/dev/null
> 2>&1
>        dd if=/dev/shm/$OUT of=$OUT bs=100000 count=1024
>        rm /dev/shm/$OUT;
> else
>        dd if=/dev/zero of=$OUT bs=100000 count=1024
> fi
> sync
> W=$(which purge);
> if [ "$W" == "" ] ; then
>        sudo echo 3 > /proc/sys/vm/drop_caches;
> else
>        purge;
> fi
> sleep 1
> echo -e "\nreading:"
> dd if=$OUT of=/dev/null bs=100000 count=1024
> rm $OUT;
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (477843).
> https://bugs.launchpad.net/bugs/500069
>
> Title:
>  USB file transfer causes system freezes; ops take hours instead of
>  minutes
>
> Status in The Linux Kernel:
>  Confirmed
> Status in “linux” package in Ubuntu:
>  Triaged
> Status in “linux” package in Fedora:
>  Unknown
>
> Bug description:
>  USB Drive is a MP3 Player 2GB
>
>  sbec@Diamant:~$ lsusb
>  Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>  Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>  Bus 003 Device 002: ID 046d:c50e Logitech, Inc. MX-1000 Cordless Mouse
> Receiver
>  Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>  Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>  Bus 001 Device 004: ID 0402:5661 ALi Corp.
>  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>  sbec@Diamant:~$
>
>  Linux Diamant 2.6.31-15-generic #50-Ubuntu SMP Tue Nov 10 14:54:29 UTC
> 2009 i686 GNU/Linux
>  Ubuntu 2.6.31-15.50-generic
>
>  to test, i issued dd command:
>  dd if=/dev/zero of=/media/usb-disk/test-file bs=32
>
>  while dd is running i run dstat.... this is in the log file attached.
>
>  other logs are also in the tar.gz file...
>
>  there is a huge USB performance Bug report #1972262. this Report is
>  something simular
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/linux/+bug/500069/+subscriptions
>