Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I have running a pair of servers using drbd to do mirroring. Primary is using dual bonded gigabit. Secondary didn't have gigabit yet. And the 100 Mbit it was running was incorrectly set to half duplex. Hearbeat dropped packets. That seems expected. Drbd was continually dropping the connection. That seems expected. But here's something interesting: it affected services on the primary. Both netatalk and smb clients were dropping connections frequently. I'm assuming this is due to the way protocol C works. IO isn't flagged as done until the secondary acknowledges it. And a duplex mismatch majorly impacts network operation. This is in effect means that anything that impacts IO on the secondary impacts the primary's functionality. They're like siamese computers :-) -- Maurice Volaski, mvolaski at aecom.yu.edu Computing Support, Rose F. Kennedy Center Albert Einstein College of Medicine of Yeshiva University