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+ DRBD is a shared-nothing, synchronously replicated block device. It
+ is designed to serve as a building block for high availability
+ clusters and in this context, is a "drop-in" replacement for shared
+ storage. Simplistically, you could see it as a network RAID 1.
+ Please visit http://www.drbd.org to find out more.
+The here included files are intended to help understand the implementation
+ relates some functions, and write packets.
+conn-states-8.dot, disk-states-8.dot, node-states-8.dot
+ The sub graphs of DRBD's state transitions