Hello I hope, that this is the correct mailinglist... if not, pls let me know... So, there is a problem with the samsung t5 and t7, those ssd's are just samsung 850 with an usb-c adapter. They should get added to the ata_device_blacklist in libata-core.c Those 4 lines should work in theory, but i was unable to test it, would be nice, if someone how knows what he is doing could do this. { "Samsung Portable SSD T5", NULL, ATA_HORKAGE_NO_NCQ_TRIM | ATA_HORKAGE_ZERO_AFTER_TRIM, }, { "Samsung Portable SSD T3", NULL, ATA_HORKAGE_NO_NCQ_TRIM | ATA_HORKAGE_ZERO_AFTER_TRIM, }, Sorry for my poor english I hope this helps somehow fix the problem. Best regards -- Sven Hugi