On Thu, Feb 24, 2011 at 12:01:59PM +0100, Gizo Nanava wrote:
> One question to be on safe side, if something goes wrong, would it be 
> possible to reuse the replaced OSS?

Well, the problem is if the clients & the MDS reconnect and start performing 
operations (writes, creations, ...) on the new OST, you will of course miss all 
those updates on the old one.

BTW, i have just realized that you want to replace the whole OSS and not just 
the storage. Is the new OSS going to have the same nid as the old one? If not, 
the procedure becomes more complicated since you need to update the 
configuration logs on the MGS:
http://wiki.lustre.org/manual/LustreManual18_HTML/ConfiguringLustre.html#50651184_pgfId-1303457

HTH

Cheers,
Johann

-- 
Johann Lombardi
Whamcloud, Inc.
www.whamcloud.com
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