> Those are not the backing devices. Backing devices are the ones named 
> on the "disk " lines in your DRBD resource files - for example "disk 
> /dev/vg/lv1". 

Sorry, for a second I was thinking of the drbd disks as backing devices for the 
LVM volumes that were created on them, but you're absolutely right.

> So you need to exclude /dev/vg/lv1 (in that example) from being looked 
> at by LVM by filtering it out.

On my servers, I have /dev/vg00/lv01 and /dev/vg00/lv02, which are the backing 
devices for /dev/drbd0 and /dev/drbd1 respectively. Then I made drbd0 and drbd1 
into PVs, and created logical volume /dev/vg_drbd0/lv_drbd0 on drbd0, and 
/dev/vg_drbd1/lv_drbd1 on drbd1. 

You're saying that I should filter /dev/vg00/lv01 and /dev/vg00/lv02 in 
lvm.conf? That won't have any undesirable side effects?

--Eric





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