[dm-devel] What is a /dev/dm-* file ?

[Chao Yang <chyang redhat com>]

Hi there,

I have questions about /dev/dm-* in my mind for days, it seems here is the right place for the answers.
What is a /dev/dm-* file?  it says "/dev/dm-0: block special" from file command.
Is there a limitation to the number of /dev/dm-* files ? I tried with RHEL6.1 GA, created 800 from dm-0 to dm-799 as maximum.
Thanks.


Best,
Chao