[DRBD-user] data loss?

Musard, Kris Kris.Musard at spirentcom.com
Mon Aug 29 20:17:13 CEST 2005

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

I recently experienced some data loss with drbd.  I had a resource "r0"
which lost its connection about a month ago and went unnoticed.  This past
weekend something caused both machines to reboot.  They are both running
heartbeat.  The machine with the older data started heartbeat first and
became primary.  A sync occurred causing the older data to be copied to the
other node.  In order to prevent this from happening in the future I have
put a script in place to monitor the status of drbd and notify me when
resources are not connected.  I also set the "on-disconnect reconnect"
parameter for all of my resources.  My question is what would have caused
the older data to look newer to drbd and cause the incorrect re-sync, and
what additional steps can be taken to prevent this from happening in the


Kris Musard
Senior Software Analyst
Service Assurance - Broadband
15200 Omega Drive, 2nd Floor
Rockville, MD 20850-3240 USA
Office: +1 301.417.6464
Fax: +1 301.590.3662
Pager:  +1 800.SKY8888 PIN#1266930
kris.musard at spirentcom.com

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