8.0-RC1: AMD CS5536 (Geode) USB 2.0 controller strange behavour
Hans Petter Selasky
hselasky at c2i.net
Sat Sep 26 07:08:15 UTC 2009
On Saturday 26 September 2009 06:24:23 Eugene Grosbein wrote:
> I have got fanless computer named NICE 3120,
> it is based on EBC 420-LX8 motherboard and AMD Geode LX800 processor.
> I've installed 8.0-RC1 here and it runs just fine as a router
> using internal CompactFlash 256Mb card. Now I'm trying to use USB 2.0 HDD
> <Seagate FreeAgent Go 102D> that gives me stable 27 megabyte/sec
> write speed to /dev/da0 using dd when connected to another 8.0-RC1 system
> with ICH7 but with this CS5536 its behavour is very strange.
> "dd if=/dev/zero bs=256k of=/dev/da0 count=100" may result in 1.7MBytes/s
> or 16Mbytes/s or 400Kbyte/s (sic!) write speed. dd measures speed right,
> very often it writes way too slow.
Try using bs=65536
Output from "usbconfig" would also be nice. Might sound like your device is
sometimes connected at FULL speed.
Have you taken spin-up time into account?
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