xfs data loss

[Eric Sandeen]

Passerone, Daniele wrote:
>>> Due to a power shock, suddenly and without log messages about one half
>> (5 TB) of the user
>>> directories on /dev/md4 have disappeared.
>> I presume you mean after a reboot?
> 
> 
> 
> No! No reboot at all.

Ok then perhaps I don't know what you mean by "power shock"

> The directories were mounted via nfs to all our cluster,
> and are of the type 
> 
> /pool/user
> 
> all directories from 
> 
> /pool/g*
> 
> to
> 
> /pool/z*
> 
> have disappeared.

On the server as well?  Or just clients?  -really- no server-side errors 
in the logs?

Are you sure the storage hardware & the md volume is in ok shape?

> Of course NO COMMAND of the kind rm /pool/[g-z]* was issued.
> 
>> Were the lost directories recently created?  I've never heard of
>> untouched, existing directories disappearing after a power loss...
>>
> 
> Not at all.
> Here I am.
>> Not much to go on here I'm afraid.  SLES10 is an old kernel, but it's
>> supported by SuSE at least.
>>
> 
> Can you use my metadata, or is it useless?

Not yet, still wondering what really happened.

-eric

> Thank you!
> 
> Daniele
> 
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