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I am using Ubuntu 12.04 . I am here to know is there any way to observe Writing & Reading Speed of the USB through the terminal .

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up vote 4 down vote accepted

You can use rsync to give an approximation of your transfer speed, although it will vary depending on whether small or large files are being transferred and whether the destination is a slow flash drive or a fast external hard disk. For example:

rsync -avviu ~/Videos /media/Mik2

sent 874419803 bytes  received 149 bytes  4427442.79 bytes/sec
total size is 874312527  speedup is 1.00

(Also, if you open tail -f /var/log/kern.log and then connect your device you can see whether it is being set up for ehci (enhanced host controller interface), which supports USB 2 speeds. For example, the kernel log should state 'new high-speed USB device...using ehci_hcd'.)

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The pv tool allows you to view the throughput of the data flowing through it. After installing the package, you could run a command like the following to see the write rate:

$ cat /dev/zero | pv > /media/some_usb/tmp123

203.1MiB 0:00:02 [100.2MiB/s] [ <=>                   ]

For reading, perform the opposite operation using the newly-created tmp123 file:

$ cat /media/some_usb/tmp123 | pv > dev/null
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Try with this:

$ sudo lsusb -vvv

Then, have a look at the entries named bDeviceProtocol and bInterfaceProtocol

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" bInterfaceProtocol 80 Bulk-Only " " bDeviceProtocol 0 " means what ? But this answer not suitable to My Question .Thank you ,:) – Raja Jul 11 '12 at 16:40
Did you use the -vvv option? In my computer, there is a description associated to the 0 value: "0 Full speed (or root) hub" – jap1968 Jul 11 '12 at 16:44 – Raja Jul 11 '12 at 16:46
You are right. This information seems to appear only on some devices. – jap1968 Jul 11 '12 at 16:54
thank you amigo – Raja Jul 11 '12 at 16:55

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