You might install usbview and run it. It will give you a gui window and let you drill down and examine what each USB device looks like. It would make me think it is some BTRFS issue. maybe for some reason the disk is fragmented and having to write blocks all over the place. The way I know to test this is to write the file, note the rate that you write it, and then clear the disk cache on the machine and/or force dd to read the file enabling directio and see if it is slow coming off the disk. If it is fragmentation the read off the disk will be similarly slow. On Thu, Aug 15, 2024 at 1:16 PM Andre Robatino <robatino@xxxxxxxxxxxxxxxxx> wrote: > > The portable drive is a HDD, formatted with BTRFS (same as each of the three F40 machines, the two desktops and the laptop). The desktops have HDDs and the laptop has an SSD but they always have and the transfer speed used to be faster, none of that hardware has changed. After noticing the slow transfer, I'm testing by rsync'ing a single large file in both directions to note the transfer speed (and of course deleting it on the target disk afterwards so it's doing the full transfer each time). I suppose that nowadays it's rare to have machines with black USB 2.0 ports so that may be why nobody's noticed it, my hardware is old. As I said the speed seems to be more or less normal to/from the laptop with its USB 3.x ports, though I'm puzzled why it would be slower with the yellow ports than the blue ones, yellow ports are faster. > -- > _______________________________________________ > 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, report it: https://pagure.io/fedora-infrastructure/new_issue -- _______________________________________________ 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, report it: https://pagure.io/fedora-infrastructure/new_issue
