[DRBD-user] DRBD + LVM (GFS2)

Graham Wood drbd at spam.dragonhold.org
Mon Feb 12 16:59:56 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.


> Yeah it turns out the problem was that both disks were not synched, and
> neither was considered the Primary, nor Up To Date so I had to fully resync
> them to get it working.  6 hours later (I seem to have an I/O bottleneck at
I had a problem with rc1 that it wouldn't let me set the sync target  
primary until it had resync'd (it hung the resync, and the command  
never returned).  However, with my latest reinstall things are a  
little more sensible - and I can go dual primary during the resync.   
Performance was about 20MB/s even from the target during the sync  
(hdparm -tT) which I thought was pretty impressive.  My bottleneck  
(about 50MB/s raw) is my disks, the network is a dual gigabit link  
*grin*

> Found duplicate PV <hash> using /dev/sda3 not /dev/drbd0
> After the filter was in place however it worked great.
Yeah - I've got my filter set to ONLY see drbd0 to avoid that sort of  
problem (I think that something must have gone wrong with the filter  
to get my really weird behaviour earlier that made no sense to anyone).

> do not appear to be currently available in the current version of Fedora.
Considering that Fedora is RHEL's beta testing stuff *grin*, you've  
probably got the new versions of all the tools - they use openais for  
the inter-node communication, and a lot of tidying up has gone on.



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