[dm-devel] help : device mapper is robust over power failure ?

["kiran dalvi" <kiran_bd hotmail com>]

Hi All,

 I want to know whether device mapper is robust over power failure ?
 If it is then I want to know how I can test this functionality.

  for example :
       I have two disks and I am mirroring first disk data on second disk. 
Is there any way I can see
       status of data mirroring.If during mirroring process power is failed 
then how device mapper will
       handle that state ?

  Please guide me.

Regards
Kiran

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