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kernel/linux-rt-4.4.41/Documentation/blockdev/drbd/README.txt 612 Bytes
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  Description
  
    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
  
  DRBD-8.3-data-packets.svg, DRBD-data-packets.svg  
    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