[DRBD-user] Question on drbdadm verify

Dominik Klein dominik.klein at googlemail.com
Fri Jul 1 12:51:08 CEST 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.



On 06/28/2011 08:29 AM, Dominik Klein wrote:
> Hi
> while recovering from a failure that impacted a node's power and its
> raid controller's battery (ouch), I came across a question regarding
> drbdadm verify I could not find the answer to. Maybe you guys can shed
> some light.
> In my situation, drbd thinks it did write data that might not have made
> it to disk (read: simultaneous power and raid ctrl battery failure). I
> can see that the root fs misses data about 1 minute of logs, so I assume
> something like this for the drbd partitions as well.
> So, say there is a cronjob on the node that had the outage which runs
> drbdadm verify every day. Would blocks that changed on node2 (no outages
> there) in the meantime be overwritten with what is empty/bad on node1?
> I know it wouldn't be overwritten right away, just marked oos, but what
> would happen on the next disconnect/connect?
> Regards
> Dominik

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