[ Not sure where to send this question. This mailing-list seems to be much more oriented towards development of libata code than its use, but the question seems too technical for other foras. ] I'm trying to use a SATA M.2 drive in a Thinkpad X30 (via a PATA->M.2 enclosure) and am bumping into a ~30MB/s bandwidth limit that's apparently imposed by the BIOS for "lack" of an 80-wire cable. This is mentioned at the end of https://www.thinkwiki.org/wiki/How_to_put_SATA_in_old_ThinkPads and links to https://forum.thinkpads.com//viewtopic.php?f=31&t=115478&p=741729 which mentions this as a known problem. Is there some known workaround for it? I tried to boot with `libata.force=80c` and it does result in `hdparm` claiming that `udma5` is used instead of `udma2`, but that seems to be a lie because the actual bandwidth I see is still ~30MB/s. How can I diagnose the problem further (and ideally fix it)? Stefan
