Date: Tue, 3 Feb 2026 17:43:01 +0300 From: Anton Shepelev <anton.txt@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: external USB disk: 400MB/s transfer, but get only 40MB/s Message-ID: <20260203174301.e4c0cef69c2ea7a2a9d62eba@gmail.com> References: <aXoypNa5LYrleVfS@c720-1400094>
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Matthias Apitz: > The disk was always announced in /var/log/messages as > a 400.000MB/s transfers devices by the driver, but the > measured transfer was only between 40MB/s and 50MB/s. > The file system on the USB disks was NTFS. High-speed USB disks use a protocol different from that of typical USB sticks. Due to licensing (or other) problems, FreeBSD does not support that protocol. I too have a Kingston XS external USB drive that works at lightning speed in Windows, but is very slow in FreeBSD, and takes forever (about 30 seconds) to mount, during which time it decides to fallback to the generic removable-storate protocol. Test your disk in modern Windows and/or Linux.home | help
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