Writing to flash has more to do with how the flash firmware works. To write to flash a full block needs to be erased and then you can write to it. Some firmware/devices keep free already zero'ed blocks and those can be written to fast but once those run out then it has to erase before writes. The more expensive ones can erase faster and/or keep more zero'ed blocks in reserve. When shopping for them, the better manufactures will give you both read and write speeds because of this. If yours did not have a speed listed then I would assume it is slow. On Sun, Mar 14, 2021 at 6:06 AM Ed Greshko <ed.greshko@xxxxxxxxxxx> wrote: > > On 14/03/2021 18:00, Tim via users wrote: > > dd if='fedora.iso' of=/dev/sdb status=progress > > > > I only get around 6 megabytes per second on a USB 2 Sandisk Cruzer > > Blade flashdrive (store bought, not fleabay) plugged directly into a > > motherboard's USB 3 port - one that's not sharing its host with any > > other ports in use. > > Do you get better perfomance if you use a larger block size? > > Using USB3 and the default block size I get about 12.6 MB/s > > Changing to bs=65536 I get overall 93.5 MB/s on a 2.1 GB iso transfer. > > > -- > People who believe they don't make mistakes have already made one. > > _______________________________________________ > users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx > Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
