[OpenAFS] Re: Volumes lost on fileserver / vldb post fs crash

[Hartmut Reuter]

Generally the salvager in MR-AFS can recreate lost directories filling 
them with
entries lost+found.<vnode>.<uniquifier>. This is bettter than nothing.

However, if the root directory is lost for some reason that doesn't work.
There was two or three months ago a case on this list where someone
had lost the root directory. I could help him by creating a new empty volume
and then restoring incrementally a dump of his broken volume into this 
new one.
The new volume had an empty root directory, of course. Now the
MR-AFS salvager was able to reconnect the whole tree.
The user only had to rename the lost+found entries in the root directory
to the original ones.

Hartmut

Derrick J Brashear wrote:
> On Mon, 26 Apr 2004, Joe Buehler wrote:
> 
> 
>>Derrick J Brashear wrote:
>>
>>
>>>I know I'm forgetting, but, what cases does it lose in other than "you
>>>trashed the root vnode of the volume"?
>>
>>That may or may not have been the problem, I'm not familiar enough with
>>AFS internals to remember if that's what I ran into.
> 
> 
> Ok. Well, if there's code in MRAFS to fix that, well, I'd love to have it,
> but, life's hard.
> 
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Hartmut Reuter                           e-mail reuter@rzg.mpg.de
					   phone +49-89-3299-1328
RZG (Rechenzentrum Garching)               fax   +49-89-3299-1301
Computing Center of the Max-Planck-Gesellschaft (MPG) and the
Institut fuer Plasmaphysik (IPP)
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