Date: Sat, 6 Jan 2018 21:17:54 -0700 From: Warner Losh <imp@bsdimp.com> To: blubee blubeeme <gurenchan@gmail.com> Cc: "O'Connor, Daniel" <darius@dons.net.au>, gljennjohn@gmail.com, FreeBSD current <freebsd-current@freebsd.org> Subject: Re: USB stack Message-ID: <CANCZdfobwBwEDwcX=sz17rVh8DugTbJPjG0q6HWcgkoT0sQ=CQ@mail.gmail.com> In-Reply-To: <CALM2mEmX_3F1ivmT2gRKjenFQwf3mEbGzb%2BFx4KbuVzZsQ=LWA@mail.gmail.com> References: <CALM2mEmZFP9dGOivJknrCaaa-K1cSxNTTEV%2B8XCMpoZp-xcbqQ@mail.gmail.com> <1FD1FE97-D25C-4BAC-A3E0-F22509FB0C2B@dons.net.au> <CALM2mE=7cKcPzJ=-bVvmHez2inrAqJsuMaW%2BUZZtXesB3pzDtQ@mail.gmail.com> <6A4FF1B9-D98B-4E73-9E3E-E951749E0C21@dons.net.au> <20180104092349.2821f9f9@ernst.home> <18F01F2F-8907-4CF8-A80A-B6B5C16593B7@dons.net.au> <CALM2mE=uFK0BVqxFcrU_K%2BN%2BwYnu9VTewACeNqPTGYFEv93g4g@mail.gmail.com> <CALM2mEmX_3F1ivmT2gRKjenFQwf3mEbGzb%2BFx4KbuVzZsQ=LWA@mail.gmail.com>
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On Sat, Jan 6, 2018 at 9:08 PM, blubee blubeeme <gurenchan@gmail.com> wrote: > On Sun, Jan 7, 2018 at 11:56 AM, blubee blubeeme <gurenchan@gmail.com> > wrote: > > > I ask does FreeBSD usb stack actually implements USB spec 2.0 or greater > > and the topic gets derailed...? > > > > Are you guys saying that 7-8MB/s is USB speeds? > > > > On Thu, Jan 4, 2018 at 6:44 PM, O'Connor, Daniel <darius@dons.net.au> > > wrote: > > > >> > >> > >> > On 4 Jan 2018, at 09:23, Gary Jennejohn <gljennjohn@gmail.com> wrote: > >> >> What is an "LG v30"? > >> >> > >> > It's a smartphone from LG and only supports USB2 speed. The reported > >> > transfer rate is no big surprise. > >> > >> OK thanks. > >> > >> -- > >> Daniel O'Connor > >> "The nice thing about standards is that there > >> are so many of them to choose from." > >> -- Andrew Tanenbaum > >> GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C > >> > >> > > Actually, this post: https://forums.freebsd.org/threads/41041/ > > on the forum from 2013 pretty well describes what I am experiencing when > moving data over USB. > > I have no problems hitting very high read/ write speeds using dd or > downloading something but copying by USB is excruciatingly slow. > > Why is that? If you are copying a boatload of tiny files to USB there's two issues. Both our UFS and MSDOS don't do well in this case. Second, for flash based USB thumbdrives, most of them have horrible write performance unless you buy quality drives... Warner
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