[Tfug] Solution---Crappy USB LVM/Software RAID10 performance?

[Matt Jacob]

I'm reaching for my white glove to slap the crap out of you as I speak...

On Sat, May 30, 2009 at 12:56, Bowie J. Poag <bpoag at comcast.net> wrote:
>
> Found the problem.
>
> The motherboard on my Linux box is an old MSI motherboard from 2004, and
> uses a stock USB 2.0 (read: NOT a "High Speed USB 2.0") chipset from ATI.
> The box is running an admittedly ancient version of Linux, Fedora Core 6
> x64.
>
> The kernel module responsible for handling that chipset doesn't distinguish
> between "USB 2.0" and "High Speed USB 2.0".. It only distinguishes between
> USB 1.1 and USB 2.0. It will just see the hardware as USB 2.0 and report it
> bogusly as "High Speed USB 2.0" at load time.* Damned dirty lies! There's a
> bug filed against it and everything.
>
> So anyhoo, I disconnected one of the drives (was nice to see the RAID 10
> continued to work at this point, incidentally), took it over in the other
> room benchmarked on my Hackintosh laptop, and it hauled ass.... 39.5MB/sec
> versus 19.5MB/sec.  It's a USB issue. Problem solved.
>
> Cheers,
> Bowie
>
> (* = I got to use the word "bogusly" today.)
>
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