Date: Thu, 5 Nov 2020 10:27:33 +0100 From: Gary Jennejohn <gljennjohn@gmail.com> To: vermaden <vermaden@interia.pl> Cc: freebsd-usb@freebsd.org Subject: Re: mSATA SSD over USB adater: 300MB/s @ Linux versus 100MB/s @ FreeBSD Message-ID: <20201105092733.30d6d2a9@ernst.home> In-Reply-To: <uegzkiqfagbtouldiwpf@svwv> References: <bfpxcgtgpqkwctqlhswo@dwvh> <uegzkiqfagbtouldiwpf@svwv>
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On Thu, 05 Nov 2020 10:13:51 +0100 vermaden <vermaden@interia.pl> wrote: > Hi. > > After this tweet: > https://twitter.com/ed_maste/status/1323635634221756416 > > Ed Maste suggested that I should post here some details about it. This is what I am doing right now. > > The case is/was: > > Dell XPS 12 with Intel i5-3317U CPU from 2012 and internal mSATA SSD (typical 500MB/s read/write SSD). > > This one to be precise: > https://arstechnica.com/gadgets/2012/12/review-dells-acrobatic-xps-12-is-the-windows-8-convertible-to-beat/ > > Then with this USB<>mSATA adapter (probably some noname from China: > https://allegro.pl/oferta/pendrive-ssd-mini-pci-e-msata-do-usb-3-0-6016971433 > > I attached another mSATA SSD (typical 500MB/s read/write SSD) to the one of the USB 3.0 ports. > > Then I executed this command: > > // FROM INTERNAL TO EXTERNAL @ Linux > # dd < /dev/sda > /deb/sdb bs=8M status=progress > > // FROM INTERNAL TO EXTERNAL @ FreeBSD > # dd < /dev/ada0 > /deb/da0 bs=8m status=progress > > Average speed of that operation was: > > Linux: 300MB/s > > FreeBSD: 100MB/s > > Here are the detailed logs of dmesg/pciconf/usbconfig commands: > http://athena.zia.io/~vermaden/dell.xps.12.logs.tar.gz > > For this operation I booted from the FreeBSD 12.2-RELEASE 'memstick' image on USB pendrive. > > Not sure how else I can help. > FreeBSD does transfers with a maximum size of 128kB. Try repeating both tests with bs=128k to have a level playing field. -- Gary Jennejohn
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