So it is only slow on the slow port? If so it kind of sounds like the fs may be mounted sync and/or the disks write cache is disabled. smartctl --xall <device> sometimes works against usb disk and sometimes it does not work. if it works it will tell you the write cache status. The sync and/or btrfs filesystem settings would be seen in /proc/mounts
On Thu, Aug 15, 2024 at 3:09 PM Andre Robatino <robat...@fedoraproject.org> wrote: > > The drive is about 76% full but I don't think it's fragmentation since the > transfer of the same ~2 GB file to the portable drive is consistently > relatively fast from a blue or yellow USB port, and very slow from a black > USB port. Here's the output of "df -T /dev/sdb1" with the drive plugged in: > > Filesystem Type 1K-blocks Used Available Use% Mounted on > /dev/sdb1 btrfs 976759808 735116440 239872328 76% > /run/media/andre/Seagate > > Below is the output from usbview, this is with it plugged into the desktop's > black USB 2.0 port so it's only showing that speed, not the USB 3.0 speed of > the portable drive. > > Backup+ BK > Manufacturer: Seagate > Serial Number: NA515PK9 > Speed: 480Mb/s (high) > Bus: 2 > Address: 3 > USB Version: 2.10 > Device Class: 00 > Device Subclass: 00 > Device Protocol: 00 > Maximum Default Endpoint Size: 64 > Number of Configurations: 1 > Vendor Id: 0bc2 > Product Id: a013 > Revision Number: 01.00 > > Config Number: 1 > Number of Interfaces: 1 > Attributes: 80 > MaxPower Needed: 100mA > > Interface Number: 0 > Name: usb-storage > Alternate Number: 0 > Class: 08 > Sub Class: 06 > Protocol: 50 > Number of Endpoints: 2 > > Endpoint Address: 02 > Direction: out > Attribute: 2 > Type: Bulk > Max Packet Size: 512 > Interval: 0ms > > Endpoint Address: 81 > Direction: in > Attribute: 2 > Type: Bulk > Max Packet Size: 512 > Interval: 0ms > -- > _______________________________________________ > 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, report it: > https://pagure.io/fedora-infrastructure/new_issue -- _______________________________________________ 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, report it: https://pagure.io/fedora-infrastructure/new_issue
