Re: Help with XFS

[Thomas Førde <thomas.forde@xxxxxxxxxxxx>]

they have all the data in tape, but not
the processed data, so that has to be redone, will take about  15-30
days work to get updated.

ill see if we can rebuild a different
SAN with mirror functionalityt, y have 384x300GB disk in my SAN, so it
should be possible.






Sincerely
-------------------------------------------------------------------
Thomas Førde    IT-Manager 
Mobile +47 90 41 41 90   Fax +47 55 31 67 66
thomas.forde@xxxxxxxxxxxx     www.bergenofs.no
-------------------------------------------------------------------
Bergen Oilfield Services AS
Address: Nedre Aastveit 12    NO-5106 Ovre Ervik
-------------------------------------------------------------------

Please consider the environment before printing



From:      
 Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
To:      
 Thomas Førde <thomas.forde@xxxxxxxxxxxx>
Cc:      
 xfs@xxxxxxxxxxx
Date:      
 18.06.2010 14:00
Subject:    
   Re: Help with
XFS

---

Le Fri, 18 Jun 2010 13:43:57 +0200
Thomas Førde <thomas.forde@xxxxxxxxxxxx> écrivait:

> the raid array is a FC SAN array consisting of DS4700 unit with
> EXP810 expansion system
> 
> xfs_check first, xfs_repair -n, and xfs_repair
> 
> xfs_Repair -L has not been used.

That's fortunate, maybe something can be saved from that.

> its seismisc processed data, large text files.
I see. Extremely expensive to reproduce... 

If you know the file structure and the metadata isn't much ineresting,
a simple perl or python script can scrap the raw device for the data.
I've done it before. I can send you code snippets if you want.

Did you have any success compiling xfs_irecover?

It's a side note but one of my customers is specialised in seismic data
acquisition, and record every data twice on two different RAID-1
systems and always keep at least two copies of everything, plus an
on-tape copy... A commodity 16TB NAS costs much less (10000 € or less)
than the data it holds and makes a nice backup system. NOTHING replaces
a backup. Your system WILL fail someday (well it has now apparently).

-- 
------------------------------------------------------------------------
Emmanuel Florac     |   Direction technique
                    |
  Intellique
                    |
               
<eflorac@xxxxxxxxxxxxxx>
                    |
  +33 1 78 94 84 02
------------------------------------------------------------------------