Your link is very useful, it works now. Thanks. By the way, I changed /etc/drbd.conf like below: (drbd-8.3.0) #after-sb-0pri disconnect; after-sb-0pri "discard-older-primary"; #after-sb-1pri disconnect; after-sb-1pri discard-secondary; I think, for "one node power off" case, "after-sb-1pri discard-secondary; " will cause power off machine as sync target. By this way, it will avoid "unknown" status. I tested three times, it works. Best regards, Edward > Date: Sat, 11 Apr 2009 13:35:23 +0200 > From: r.bhatia at ipax.at > To: guohuai_li at hotmail.com > CC: drbd-user at lists.linbit.com > Subject: Re: [DRBD-user] Power off caused "Unknown" status. > > On 11.04.2009 04:39, guohuai li wrote: > > ue these commands, the logs on machine B are attached. > > > > It shows "Split-Brain detected". > > > > How to avoid this problem ? And how to restore it to proper status ? > > please refer to > http://www.drbd.org/users-guide/s-resolve-split-brain.html > > cheers, > raoul > --

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