"b" stands for block device; just like "c" will represent a character device.
I looked all over the place for that kind of information years ago... strangely, I found in when scanning the man page for 'find'.
From: "Bob Goodwin ~ Zuni, Virginia, USA" <bobgoodwin@xxxxxxxxxxxx>
To: Fedora List <users@xxxxxxxxxxxxxxxxxxxxxxx>
Sent: Monday, September 23, 2013 3:05 PM
Subject: permissions -
I spent the last half hour googling with no success. What does the "b"
mean and how is it controlled?
[root@box10 bobg]# ll /dev/sdb*
brw-rw----. 1 root disk 8, 16 Sep 23 14:36 /dev/sdb
brw-rw----. 1 root disk 8, 17 Sep 23 14:36 /dev/sdb1
Bob
--
http://www.qrz.com/db/W2BOD
box10 Fedora-19 Linux/XFCE
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