Setting up DRBD in an Open Source SAN

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"In this procedure, you have learned how to set up a DRBD device on a SAN network. That's a nice start if you want to create a mission-critical open source SAN, but it's not good enough. As your servers are configured right now, if san1 goes down, you need to issue the drbdsetup primary command manually on the second server, which you don't want to do. That is where Heartbeat cluster comes in. And in the next part of this series, we'll discuss how to set up this cluster."

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