debian-laptop:~# ls /sys/block/ hda loop2 loop5 ram0 ram11 ram14 ram3 ram6 ram9 loop0 loop3 loop6 ram1 ram12 ram15 ram4 ram7 sda loop1 loop4 loop7 ram10 ram13 ram2 ram5 ram8
debian-laptop:~# ls /sys/block/sda/ capability device queue removable sda2 size stat uevent dev holders range sda1 sda3 slaves subsystem
