[DRBD-user] drbd on nfs mounted drives

[Helmut Wollmersdorfer]

Vedshri Deodhar wrote:

> Wanted to know if drbd can work on nfs mounted partitons.
> Say i have mounted a nfs exported directory  on /san1/home1  from
> server A and another directory mounted via nfs on /san2/home2 exported
> from server B. Both the mounted partitions are on a single machine
> Now if i want to replicate data between /san1/home1 and /san2/home2 ..
> is this possible using drbd ?
> Or is drbd possible on only on block devices ?

DRBD needs something as a 'low level device' which works like a block 
device, i.e. a raw partition, md, lvm.

You would need to umount any fs first, and configure DRBD with metadata 
'external' on the partition(s).

> If drbd is not the right solution, can somebody please tell me which
> utility i can use. The data is just too huge ( approx 500Gb ) which
> needs to copied from one mount point to another.

Your 500 GB need to go over the network connection anyway. Maybe you 
take out the harddisk and put it into the target system for a faster copy.

Helmut Wollmersdorfer