[DRBD-user] DRBD + Heartbeat + 1 eth + 1 serial

Matteo Campana matteo.campana at klarya.it
Thu Sep 27 13:06:39 CEST 2007

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

Hi Lars and all the guys in ML :).
My problem is to understand the behaviur of my HA system: I have read in 
the documentation about heartbeat that at least 2 channels of 
communication between 2 nodes are required to preserve the system from 
the "split brain" problem (in my system I have 1 ethernet +  1 serial).
But....in my tests I see however  that DRBD says the "infamous" :) 
message "split-brain detected" ecc.. .
My test:

    * I disconnect primary node from the ethernet
    * secondary ----> primary  (ok)
    * I reconnect primary
    * secondary still remain primary (ok for my config)
    * the problem is that the two nodes are standalone and not
      re-syncronize theirs drbd partition.

 DRBD does not use also the serial channel in order to communicate 
between the nodes?
And if does not,  there is  a lack of documentation :)


*Ing. Matteo Campana
System Engineer

Klarya s.r.l.*

Sede Operativa:
Via Agnini 47 - 41037 Mirandola (MO)

Tel +39 0535 27325

Fax +39 0535 610050

Mob +39 320 4258536

Sede Legale:
Via Salgari, 17 - 41100 Modena

Tel +39 059 821332 Fax +39 059 821492

email: matteo.campana at klarya.it

web: www.klarya.it

**Open Source IP Communications*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20070927/c65f26db/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: logoKlarya.jpg
Type: image/jpeg
Size: 8419 bytes
Desc: not available
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20070927/c65f26db/attachment.jpg>

More information about the drbd-user mailing list