Date: Sat, 26 Sep 2009 09:08:46 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Cc: Eugene Grosbein <eugen@kuzbass.ru> Subject: Re: 8.0-RC1: AMD CS5536 (Geode) USB 2.0 controller strange behavour Message-ID: <200909260908.48389.hselasky@c2i.net> In-Reply-To: <20090926042423.GA12216@svzserv.kemerovo.su> References: <20090926042423.GA12216@svzserv.kemerovo.su>
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On Saturday 26 September 2009 06:24:23 Eugene Grosbein wrote: > Hi! > > 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. Hi, Try using bs=65536 Any difference. 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? --HPS
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