On Mon, Sep 12, 2022 at 7:56 PM Jim Lin <jilin@xxxxxxxxxx> wrote: >On Sat, 2022-09-10 at 20:52 +0900, SungHwan Jung wrote: >External email: Use caution opening links or attachments >>I have found that the read rate of "samsung Bar plus" is slower than on windows 11 (210mb/s -> 70mb/s) and recovered by disabling quirks (using /etc/modprobe.d) >>This patch affects not only "Samsung Flash Driver FIT", but also other usb flash storages. (They may use the same controller?) >>But I can't reproduce the timeout problem without quirks. >>Could you provide information to reproduce the timeout problem or logs? >>It may help us find other solutions to fix it. >> >>Thanks, >>SungHwan. >Issue was reproduced after device has bad block. > >--nvpublic If bad blocks cause the issue, in my opinion, it's better to apply this quirk by users (additional kernel parameters with a bootloader) if their flash drive has bad blocks, not the kernel patch, because the performance degradation is severe for several USB storage that didn't have bad blocks.
