[DRBD-user] DRBD local sync ?

Daniel Bourque dbourque at weatherdata.com
Fri Apr 24 18:46:31 CEST 2009

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

Unfortunately the linux LVM implementation doesn't support PV mirrors. ( 
every commercial unix does ... ) That's easiest way to migrate SANs 
without downtime.

I believe you can add a your new san's LUN as a PV to your VG , and use 
lvconvert to convert the LVs to be mirrored across the PVs, then remove 
the original PVs from the the VG, lvm automatically converts them back 
to linear LVs.

Daniel Bourque
Sr. Systems Engineer
WeatherData Service Inc
An Accuweather Company

Kristinn Soffanias Runarsson wrote:
> Is it at all possible to do a local sync (only one machine) with DRBD?
> for example /dev/sda1 --> /dev/sdb1
> I am migrating many many Linux boxes between SAN arrays and I really 
> like the "in the middle" positioning of the DRBD driver in the layer.  
> So I don't have to re-init my filesystem like I would have to do with 
> LVM (pvcreate) or Linux Software Raid (mdadm --create)
> I've tried running DRBD locally (with different ports on localhost) 
> but to no avail...
> any suggestions ?
> best regards,
> soffi
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