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

[Chao Yang]

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 

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