On Wed, Dec 09, 2009 at 06:31:43PM -0500, nixlists wrote: > Also if I am paranoid about mirror data being exactly the same on the > two halves (yes, I understand softraid should guarantee it, but > still...), how can I verify it? Or this functionality currently
It isn't identical because softraid does not initialize raid 1 because it doesn't matter. So all written data is the same but areas where the volume has not been written before will vary on the individual disks. > nonexistent? Or am I asking a stupid question because softraid is Kind of. The short is that you can't guarantee this. Even if you detect that 2 areas that should have been the same but are not you really have no way of figuring out which one is correct (if any). > guaranteed to notice these things and yell at me about them? There's > nothing in manual page about this. Can I do it with other utilities? Not really. > > tl;dr: How to verify softraid mirror integrity? You don't. This is where fsck and backups come in. Note: this whole story is different with RAID 5 & RAID 6.
