This says that my ancient MS-DOS formatted Flash card is a rotational disk! Whereas it appears to me rectangular and static. lsblk -oNAME,LABEL,RM,FSTYPE,TYPE,ROTA,SIZE NAME LABEL RM FSTYPE TYPE ROTA SIZE sr0 1 rom 1 1024M sdc 1 disk 1 15.3M └─sdc1 FLASH 16 1 vfat part 1 15.3M -- members.iinet.net.au/~kilgallin/