[linux-lvm] Mirror resync direction

Jonathan E Brassow jbrassow at redhat.com
Thu Oct 26 21:45:26 UTC 2006

On Oct 26, 2006, at 4:16 PM, Paul LeoNerd Evans wrote:
>> The use of --corelog simply means that the mirror device will be
>> resynchronized every time the device is activated.  The persistent log
>> (disk log) tracks what resynchronization has been done and can avoid
>> all complete resyncs.
> Yes, I'm aware of that bit, but I couldn't see any other way to achieve
> it with only two PVs. The "--alloc anywhere" as suggested in the error
> message doesn't have any effect for me.

Jun'ichi Nomura from NEC is working on the allocation issues - it's a 
bit buggy WRT mirrors.

However, you could use a known bug to get around having to use 
--corelog when you only have two devices.

1) lvcreate -m1 --corelog -L <don't use all the space> -n mirror vg
2) lvconvert -m1 vg/mirror

The convert doesn't currently honor the allocation schemes very well 
right now either.  It will simply put the disk log on one of the two 


More information about the linux-lvm mailing list