So we should slow down Linux so FreeBSD can keep up? :)
Od: "Gary Jennejohn" <[email protected]> Do: "vermaden" <[email protected]>; Wysłane: 10:27 Czwartek 2020-11-05 Temat: Re: mSATA SSD over USB adater: 300MB/s @ Linux versus 100MB/s @ FreeBSD > On Thu, 05 Nov 2020 10:13:51 +0100 > vermaden 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 > _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "[email protected]"
