Re: Recovering an Array with inconsistent Superblocks

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On Mon, 06 Jan 2014 15:00:46 +0100 Fabian Knorr <knorrfab@xxxxxxxxxxxxxxxxx>
wrote:

> Many thanks to both of you, Phil and Neil!
> 
> Everything works flawlessly now and I had no data loss whatsoever.
> 
> > Long term, consider creating a new array with metadata type 1.x so you
> > can use a bitmap.  If you ever have an event like this, where one or
> > more devices are disconnected then reconnected, it'll greatly shorten
> > the recovery time.
> 
> But it's not possible to upgrade the metadata version of an existing
> array, is it? 

With mdadm-3.3 you can assemble an array with 0.90 metadata using

  mdadm --assemble --update=metadata /dev/mdWHATEVER /dev/.....

and it will be converted to 1.0 metadata.

NeilBrown

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