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/sys/block/.../rotational.strace lsblk -d -o name,rota /dev/sda 2>&1 | grep --context=3 --color rotational/etc/udev/rules.d/90-non-rotational.rules:ACTION=="add|change", SUBSYSTEMS=="usb", ENV{ID_SERIAL}=="SanDisk_Ultra_Fit_*-0:0", ATTR{queue/rotational}="0", ATTR{queue/scheduler}="deadline"lsblkreports "0" for all my good old SATA spinning HDDs here (ASROCK mobo). « some USB controllers don't tell that drive is actually non-rotational (for example, USB flash) » @dma_k this is so true --and better this way than the other way for USB wired external spinning HDDs IMHA.lsblk -d -e 7 -o NAME,ROTA,DISC-MAX,MODELwhich excludes loop devices + adds the model name (manufacturer) and disk capacity.