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Re: Help with XFS

To: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Subject: Re: Help with XFS
From: Thomas Førde <thomas.forde@xxxxxxxxxxxx>
Date: Fri, 18 Jun 2010 13:43:57 +0200
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20100618133458.6640ce96@xxxxxxxxxxxxxxxxxxxx>
References: <OF4967B99D.609CC213-ONC1257745.0048E646-C1257745.004919A3@xxxxxxxxxxxx> <20100618132108.790921cf@xxxxxxxxxxxxxxxxxxxx> <OF450B8187.BD5256B0-ONC1257746.003E79FF-C1257746.003EE62C@xxxxxxxxxxxx> <20100618133458.6640ce96@xxxxxxxxxxxxxxxxxxxx>
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.

its seismisc processed data, large text files.

Thomas Førde    IT-Manager
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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 13:35
Subject:        Re: Help with XFS

Le Fri, 18 Jun 2010 13:27:01 +0200
Thomas Førde <thomas.forde@xxxxxxxxxxxx> écrivait:

> both the xfs_check and xfs_Reapir was done from a unmounted system,
> the system has not been mounted or used since.

That's good. Did you run xfs_repair -n first ? Did you run
xfs_repair -L afterwards?

> its a IBM x3650 with stadnard 2x73GB disk.

But what about the RAID array?

> [root@strmng04 ~]# cat /etc/issue
> CentOS release 4.7 (Final)
> Kernel \r on an \m
> [root@strmng04 ~]# uname -a
> Linux strmng04 2.6.9-78.0.5.ELsmp #1 SMP Wed Oct 8 07:06:30 EDT 2008
> x86_64 x86_64 x86_64 GNU/Linux
> there is no backup no, as how to backup 8 TB of data,very expensive
> tape wise.

You could have a disk backup on cheaper drives. And current tapes are
800 GB (LTO-3) or 1.5 TB (LTO-4), and libraries are cheaper nowadays.

> xfs_irecover ias been mentioned to me, so my fingers are crossed.

If your data is a huge bunch of media files or similar, photorec really
can help you as a very last resort, though you'll have to manually sort
through all this data...

good luck,
Emmanuel Florac     |   Direction technique
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