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