[DRBD-user] filesystem corrupt after unplug AC cable from primary server

kotchphile kotchphile at gmail.com
Sun Nov 11 08:55:22 CET 2007

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 serial, eth0 and eth1 connections between the two and simulate test on
various situations below. Anyone got the same results on testcase#6 like
mine? Need help on resolution!

Testcase#1: Reboot primary Server normally
Tasks: Reboot primary while copying through NFS server
Results: Switch over from PriSrv to SecSrv nicely and can unzip the tar.gz
file transferred
Testcase#2: Reboot Secondary Server (but currently has St:Primary/Secondary)
Tasks: from testcast#1, secondary server is at Primary state, so now, we
reboot Secondary server during nfs file transfer.
Results: Switch over from SecSrv to PriSrv nicely and can unzip the tar.gz
file transferred
Testcase#3: Reboot Secondary Server (but currently has St:Secondary/Primary)
Tasks: Reboot/shutdown secondary server while primary server is active
Results: Primary server still function ok
Testcase#4: Unplug Secondary Server (but currently has St:Secondary/Primary)
Tasks: Unplug secondary server to simulate secondary server crashes
Results: ok, primary server survived
Testcase#5: Remove ethernet cable from Primary Server
Tasks: Remove eth0 from primary server while nfs file transferring
Results: failover completely and can untar the gz file
Testcase#6: CRITICAL: unplug primary server
Tasks: Unplug primary server power cable to simulate power outage/crash.
Have to mkfs on drbd :-(
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