[DRBD-user] write block on primary when secondary diskless (DRBD8-3-0)

guohuai li guohuai_li at hotmail.com
Fri Nov 13 11:40:30 CET 2009


Hi, dear all,

 

on drbd.conf, use protocol C.

 

DRBD works well fistly.  ( both primany node and seconday node works well.)

 

But somehow, the seconday machine has disk problem and in the /var/log/messge of the primary node,

has below info:

 

+++++++++++++++++++++++++++++++++

Nov 13 00:12:30 cs-mdc-b kernel: drbd0: pdsk( UpToDate -> Diskless )
Nov 13 00:12:30 cs-mdc-b kernel: drbd0: Creating new current UUID
Nov 13 00:12:30 cs-mdc-b kernel: drbd0: Got NegAck packet. Peer is in troubles?
Nov 13 00:12:30 cs-mdc-b kernel: drbd1: pdsk( UpToDate -> Diskless )
Nov 13 00:12:30 cs-mdc-b kernel: drbd0: Got NegAck packet. Peer is in troubles?
Nov 13 00:12:30 cs-mdc-b kernel: drbd0: Got NegAck packet. Peer is in troubles?
Nov 13 00:12:30 cs-mdc-b kernel: drbd0: Got NegAck packet. Peer is in troubles?
Nov 13 00:12:30 cs-mdc-b kernel: drbd0: Got NegAck packet. Peer is in troubles? 
Nov 13 00:12:30 cs-mdc-b kernel: drbd1: Creating new current UUID
+++++++++++++++++++++++++++++++++
 
then at this time, the write operation on primary node is blocked.
(the write operation is like this:  call linux api  "msync", using MS_SYNC mode.)
 
Would you help to explain this ?
Is this a bug of DRBD ?  or I configured wrongly ?
 
Your help is highly appreciated.  :-)
 
Thanks for your reading.
 
best wishes,
Edward
 
 
  		 	   		  
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