Date: Tue, 13 Jun 2006 17:51:01 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: =?windows-1251?b?wuDx6Ovo6SDP5fLw7uI=?= <larry@fantasyclub.ru> Cc: freebsd-usb@freebsd.org Subject: Re: High speed USB 2.0 Message-ID: <200606131751.02348.hselasky@c2i.net> In-Reply-To: <200606131905.49741.larry@fantasyclub.ru> References: <200606131231.48216.larry@fantasyclub.ru> <200606131645.13089.hselasky@c2i.net> <200606131905.49741.larry@fantasyclub.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, On Tuesday 13 June 2006 17:05, =C2=E0=F1=E8=EB=E8=E9 =CF=E5=F2=F0=EE=E2 wro= te: > > > > Yet I don't understand, must high-speed devices work with bundled > > > FreeBSD drivers and it is my conf problem or this is not supported by > > > them? I haven't found any mentions about it in mailing lists nor PRs. > > > > Your config is supported by FreeBSD 6.0-RELEASE. > > I've done dd tests and got VERY strange results. When I try to read from > device itself (/dev/da0 or /dev/da0s1) I have 27Mb/sec. > However when I mount NTFS partition, that resides on that drive, big file > is read from that partition at 600Kb/sec. I understand, that there is some > overhead, but not that much of course. > So it seems that problem not with USB, but with what then?=20 One of the upper layers are probably reading too small chunks of data at a= =20 time. Probably it has got something to do with the implementation of the NT= =46S=20 driver. I think you will get better results with UFS and FAT32, for example= =2E=20 I am not an expert at file systems. =2D-HPS
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200606131751.02348.hselasky>