Comments (1)
mkfs.ext4 will wipe at least the first few hundred kilobytes (in the case of a 4 MiB file system, 392k; in the case of a 1 TiB file system, the first 6 MiB) and the last 32k of the file system, which historically has been plenty to erase signatures of old systems. It appears that the drbd signature is in the first 4k, so I don't see why it wouldn't be wiped.
I've looked at the documentation of drbd, and it's terrible. I can't figure out how to format a drbd device after about 10 minutes of puzzling the through the user guide before I gave up as not worth my time. If you want to give me a precise reproduction instruction that makes it obvious how to create a drbd device, please feel free to reopen this bug. Otherwise, I'm going to close it as "not reproducible".
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