Hello All,

I performed a cursory search on the forums to find if someone had a simillar situation and solution, and was successful, however the commond "insmod ehci-hcd" failed to do anything as posted in this thread. The terminal reports the command insmod doesn't exist.

I'm using a SONY Microvault 2 GB USB Memory. It's USB 2.0 Compatible (says so in bold letters on the package) and so is my ThinkPad T60p as is reported in the hardware spec and in KInfoCenter.

However, I am seeing speeds of 3 MB/s rather than the expected 60 MB/s. I am running Fedora Core 6 32Bit with the 2.6.22.5-49.fc6 Kernel.

CPU Usage is low around 5% in total over the two cores. In addition the Disk isn't doing any other transfers, for example burning a CD or anything like that. I noticed also that it rarely, but for short periods of time, jumps to 20+ MB/s. The faster transfer rarely goes for longer than three seconds.

My Playstation 3, which also runs Linux and a similar version of the Kernel takes a quarter time for the same size transfer. Both HDDs are the same speed as well.

Thank you for your efforts in helping me find a solution.

Try 'modprobe ehci-hcd' instead. You need to be root to do this.

You will never get 60MB/sec - this is the theoretical USB2.0 maximum and overheads restrict the interface to more like 40MB/sec. This seems to be around the figure claimed by manufacturers for the current fastest flash memory, but again, I don't know how close you can get.

I have an old 256MB SD card which gets a bout 9MB/sec, using hdparm (hdparm -t /dev/sdd1). This review reports only about 6MB/sec for a 66x flash memory card, again with hdparm. So I don't even know what to expect.

What are you using to measure the speed of your drive? The jumps in speed may be due to some cache emptying and refilling.

Thank you so much for helping me. I measured the speed with a simple time cp source dest and divided that by the block size and took the average speed. Additionally if you copy files in KDE it gives you a dialog that reports the actual speed in real time.

I'll try your tips when I get home later today. I also remember an error relating to the USB, something about an error -71 or so. I tried searching Google with USB Error -71 and it gave a large list of similar questions. I'm sorry if this was necessary information I should have provided initially.

Sony's site lists their Turbo cards as having an 18MB/s Write speed, but it doesn't list my card's read/write speeds. I never really thought about the about a drive's read/write speed as being really important. That certainly is an important factor now.

I'm going to see if my PSP connected via a USB-B will transfer faster.