On 2021-03-14 7:05 a.m., Ed Greshko 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.
I've gotten into the habit of using bs=4M (matches the extent size of most LVM backing devices, so md5sum'ing the source and destination is more reliably useful). -- Digimer Papers and Projects: https://alteeve.com/w/ "I am, somehow, less interested in the weight and convolutions of Einstein’s brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops." - Stephen Jay Gould _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org 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@lists.fedoraproject.org Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
