Please try AHCISATA_EXTRA_DELAY option if you use ahci(4). Otherwise, can you test kernel with this commit reverted? http://www.nerv.org/netbsd/?q=id:20211005T080105Z.58ea48edc6512b481d4fa1baba2562a3bb604d51 c.f. https://mail-index.netbsd.org/current-users/2021/10/28/msg041623.html Thanks, rin