Greg Cormier wrote:

Any reason 0.9 is the default? Should I be worried about using 1.0
superblocks? And can I "upgrade" my array from 0.9 to 1.0 superblocks?
  

Do understand that Neil may have other reasons... but mainly the 0.9 
format is the default because it is most widely supported and allows you 
to use new mdadm versions on old distributions (I still have one FC1 
machine!). As for changing metadata on an existing array, I really can't 
offer any help.

Thanks,
Greg

On 11/1/07, Neil Brown [off-list ref] wrote:
  

quoted

On Tuesday October 30, gcormier@gmail.com wrote:
    

quoted

Which is the default type of superblock? 0.90 or 1.0?
      

The default default is 0.90.
However a local device can be set in mdadm.conf with e.g.
   CREATE metdata=1.0

NeilBrown
    

-- 
bill davidsen [off-list ref]
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979