Date: Sun, 7 Jan 2018 12:20:56 +0800 From: blubee blubeeme <gurenchan@gmail.com> To: Warner Losh <imp@bsdimp.com> Cc: "O'Connor, Daniel" <darius@dons.net.au>, gljennjohn@gmail.com, FreeBSD current <freebsd-current@freebsd.org> Subject: Re: USB stack Message-ID: <CALM2mEmmPeawLbKgkRf=bMo2W3d4OzmNY3cjmVAReE3C60nmLQ@mail.gmail.com> In-Reply-To: <CANCZdfobwBwEDwcX=sz17rVh8DugTbJPjG0q6HWcgkoT0sQ=CQ@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> <CANCZdfobwBwEDwcX=sz17rVh8DugTbJPjG0q6HWcgkoT0sQ=CQ@mail.gmail.com>
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On Sun, Jan 7, 2018 at 12:17 PM, Warner Losh <imp@bsdimp.com> wrote: > > > 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 great= er >> > 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 report= ed >> >> > 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 base= d > USB thumbdrives, most of them have horrible write performance unless you > buy quality drives... > > Warner > I would consider this=EF=BC=9A https://www.samsung.com/us/computing/memory-storage/memory-cards/micro-sd-e= vo-256gb-memory-card-w-adapter-mb-mc256da-am/ 256GB Samsung microsd card quality.
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