Prevent libata from starting/stopping non-ATA devices (like ATAPI floppy drives) as they don't seem to like it: sd 1:0:1:0: [sdb] Starting disk ata2.01: configured for PIO2 sd 1:0:1:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08 sd 1:0:1:0: [sdb] Sense Key : 0x2 [current] sd 1:0:1:0: [sdb] ASC=0x3a ASCQ=0x0 Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>