USB Disk Speed

[dsr at tao.merseine.nu (dsr at tao.merseine.nu)]

On Thu, Sep 29, 2005 at 06:17:12PM -0400, Kent Borg wrote:
> So I had a very unhappy disk in my notebook.  It seemed to be a loose
> connection, I won't burden you with the low-tech details of how I
> seemed to have fixed it, but I think I am OK for the moment.
> 
> I had a recent backup on an external USB disk drive (yeah!), my
> notebook has a builtin CD-ROM drive, and Knoppix works great.
> 
> Or does it?  It took forever to to restore.  I finally asked hdparm
> what speed it was getting and Knoppix was getting 0.75MB/sec to my
> external USB 2.0 disk.  Now I am back on Ubuntu.  I asked hdparm
> again, and this time it is getting 27 MB/sec.  Any suggestions on why
> the difference?  (And what live CD does this faster?  My Knoppix is a
> bit old, maybe newer versions are faster.

That sounds like Knoppix was not loading the USB2.0 controller
driver, and only loaded the USB1.0 driver instead. Normally both
would be loaded.

Is this the most recent Knoppix, or did you use a disk that's a
year or so old?

-dsr-

-- 
We don't need smaller government.
We don't need bigger government.
We need competent government.