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

guohuai li guohuai_li at hotmail.com
Mon Nov 16 01:54:13 CET 2009


Does it need to changed to "Protocol B" instead of "Protocol C" in drbd.conf  ?
 


From: guohuai_li at hotmail.com
To: drbd-user at lists.linbit.com; lichanglong at hisense.com
Date: Sat, 14 Nov 2009 10:02:11 +0800
Subject: Re: [DRBD-user] write block on primary when secondary diskless (DRBD8-3-0)



Dear all,
 
Would you help to explain this ?
 
regards,
Edward
 


From: guohuai_li at hotmail.com
To: drbd-user at lists.linbit.com; guohuai_li at hotmail.com; liulei at hisense.com; lichanglong at hisense.com; yao.xuefeng at gmail.com
Subject: write block on primary when secondary diskless (DRBD8-3-0)
Date: Fri, 13 Nov 2009 18:40:30 +0800



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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