Verifying a DRBD filesystem

A semi-common maintenance concern regarding synchronized devices is verification. The question we should always ask ourselves in a high-availability scenario is how confident we are that the data on both nodes match.

The drbdadm utility provides a parameter specifically for addressing this need. However, there are some caveats to consider when using it, which we will explain in this recipe.

Getting ready

Follow the recipes defined in all of the previous sections before starting here. At the very least, we need a fully operational DRBD node pair to follow this recipe.

How to do it...

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