My external 1TB hard drive is connected to the front USB2.0 socket on my 11.04 box. When copying files I have a very slow data transfer rate rate of approx. 12 MB/sec maximum even though from the hard disk utility it says it is connected at high-speed USB (480 MB/s):
This the output of lsusb
:
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 046a:010a Cherry GmbH
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 008: ID 1058:1001 Western Digital Technologies, Inc. External Hard Disk [Elements]
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
This is the output of hdparm
:
~$ sudo hdparm -Tt /dev/sdc1
/dev/sdc1:
Timing cached reads: 1904 MB in 2.00 seconds = 952.06 MB/sec
Timing buffered disk reads: 96 MB in 3.06 seconds = 31.35 MB/sec
With this rate it takes hours to backup my frequently edited large video files. This it makes it almost unusuable, even more so because I know it could perform much better.
Changing the USB port to another one on the back of the computer and changing the cable to a brand new one did not make any change.
Is there any setting I need to make in addition to defaults of my still quite vanilla but update 11.04 here?
pci=routeirq
the drive made it up to 15 MB/s.