On Thu, Mar 23, 2017 at 3:57 PM, Massimo Masotti <massimo.masotti.1960@gmail.com> wrote:

Hi,
I have 12 pieces in my disk, from sda1 to sda12.

This is the expected behavior:

[root@max ~]# ls -l /dev/sda[1-9]
brw-rw---- 1 root disk 8, 1 Mar 23 14:39 /dev/sda1
brw-rw---- 1 root disk 8, 2 Mar 23 14:39 /dev/sda2
brw-rw---- 1 root disk 8, 3 Mar 23 14:39 /dev/sda3
brw-rw---- 1 root disk 8, 4 Mar 23 14:39 /dev/sda4
brw-rw---- 1 root disk 8, 5 Mar 23 14:39 /dev/sda5
brw-rw---- 1 root disk 8, 6 Mar 23 14:39 /dev/sda6
brw-rw---- 1 root disk 8, 7 Mar 23 14:39 /dev/sda7
brw-rw---- 1 root disk 8, 8 Mar 23 14:39 /dev/sda8
brw-rw---- 1 root disk 8, 9 Mar 23 14:39 /dev/sda9

The following instead seems to me a bug:

[root@max ~]# ls -l /dev/sda[1-12]
brw-rw---- 1 root disk 8, 1 Mar 23 14:39 /dev/sda1
brw-rw---- 1 root disk 8, 2 Mar 23 14:39 /dev/sda2

Don't blame ls, that's your shell globbing: [] denotes a range of single characters. [a-z], [0-9], etc. If you're using bash, you might want {1..12} (extended range expansion). See also http://www.tldp.org/LDP/abs/html/globbingref.html