Apologies if this is a silly question.

I recently changed the disk layout on one of my ES nodes to put 
/var/lib/elasticsearch on it's own disk partition.  Around 100Gb data was 
set to one side, new disk created, then rsync'd to it's new partition.

As far as I can be certain, everything was the same before and after the 
operation - just that the data now sat on it's own partition.  Ownership, 
permissions, ACL's, SELinux contexts were all synced.

When I started elasticsearch back up again, however, the 100Gb in the 
partition vanished and the node started to rebuild itself from scratch, 
copying data in from all the other nodes.

The time between stopping and restarting elasticsearch was around 15 
minutes.  I expected the data that I'd put back in place to be used first 
as most of it is historical and won't have changed.

Did I do something wrong in my procedure, or am I just expecting the wrong 
thing.

I'm hoping that doing disk maintenance like this in a production system 
doesn't trigger such a rebuild as my prod systems will have significantly 
more data.

Many thanks

Duncan

RHEL 6.5 x86_64
java-1.7.0-oracle-1.7.0.51-1jpp.1.el6_5.x86_64
elasticsearch-1.1.0-1.noarch

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