Has anybody EVER successfully recovered VINUM?

[Scott Mitchell]

On Wed, Dec 08, 2004 at 11:52:55AM +0100, Stijn Hoop wrote:
> Scott, your procedure is what I have used, except for:
> 
> On Wed, Dec 08, 2004 at 10:09:05AM +0000, Scott Mitchell wrote:
> > 6. Tell vinum to restart the failed subdisk:
> > 
> > 	# vinum start raid.p0.s0
> > 
> > 7. Wait ages while the new disk is 'revived'.
> > 
> > I was quite impressed that the volume remained available with users
> > accessing it throughout this procedure :-)
> 
> Yes I was too -- however I wasn't as impressed with the fact that I had
> parity errors afterwards. Have you run 'vinum checkparity' after these
> rebuilds?  In my case I suffered data corruption...

No, but I haven't seen any evidence of corruption in the ~1 year since the
last time I did this, so I guess we got away with it.

> AFAIK the only way to guarantee a consistent rebuild is to do it offline (at
> least in 4.x, haven't tested gvinum in 5.x yet).
> 
> > To play it safe you might want to unmount the volume before starting.
> 
> I *have* to.

I normally would unmount first if possible, to make the rebuild run faster
if nothing else.  Guess I'll make sure to do so in future.

	Scott

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