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 a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/500069
Title:
USB file transfer causes system freezes; ops take hours instead of
minutes
To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/500069/+subscriptions
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