[Lustre-discuss] Moving storage from one OSS to another

Ashley Pittman apittman at ddn.com
Mon Aug 8 14:12:47 PDT 2011

On 8 Aug 2011, at 04:57, Rafa Griman wrote:
> I know we could "just add" and restripe the existing files. But the
> customer wants to physically move 100 drives from the existing S2A9900
> to the new one in order to have 400 drives on one S2A9900 and 400
> drives on the other one.

It would be more balanced if they do that.

> So my questions are:
>     1.- Can this be done (move drives between OSTs) without losing data?

Moving drives between OSTs does not make sense - the OST is the data stored on the drives.  It is possible to move drives between controllers, you should contact DDN support for advice on this.

>     2.- Can an OST be moved from one OSS to another without losing data?

Yes, you need to use tunefs.lustre for this.

>     3.- Has anyone done this? How?

We've done this, not frequently or as part of standard maintenance but it's not unusual when expanding filesystems in the way you are.


More information about the lustre-discuss mailing list