[DRBD-user] migrating data from drbd primary

Matt mattmoran76 at gmail.com
Wed Mar 3 11:05:35 CET 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

We have a problematic cluster running Openfiler OS that has DRBD:-

version: 8.0.0 (api:86/proto:86)
SVN Revision: 2713 build by buildof at ppaten64.openfiler.com, 2007-02-26

Resources are configured with meta-disk internal;

It's about 500GB, i'd like to move this to a new DRBD node on plain CentOS
5.  The DRBD package in our CentOS repo is version 8.0.13-1.el5.centos.

I'm thinking of taking down the secondary, and replacing it with one of the
new nodes and doing a full re-sync.  After which i'll fail it over and make
the new node Primary, and eventually StandAlone.  The new node is backed by
a SAN so i'll have more options in snapshotting the data and migrating it
elsewhere, I won't be concerned about not having a Secondary as the
redundancy is in the SAN.  I'll be doing the head node redundancy soon after
with pacemaker.

Will there be any issues with replicating from a 8.0.0 primary to a 8.0.13
secondary?  If so, anyone know where I can grab the correct version 8.0.0
from for CentOS 5 x86_64?
Anybody got any idea on the sort of time a full re-sync would take for
~500GB on a gig crossover reading from a RAID5 6 DISK 10K array?  What sort
of sync rate could I set for it?


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