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RE: EIO and data corruption on XFS file system

To: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Subject: RE: EIO and data corruption on XFS file system
From: GuangYang <yguang11@xxxxxxxxxxx>
Date: Mon, 10 Nov 2014 02:57:47 +0000
Delivered-to: xfs@xxxxxxxxxxx
Importance: Normal
In-reply-to: <545BB62C.5020603@xxxxxxxxxxxxxxxxx>
References: <BLU175-W376F83659C1C70DE51C3D9DF840@xxxxxxx>,<545BB62C.5020603@xxxxxxxxxxxxxxxxx>
Thanks Stan. My comments inline...

----------------------------------------
> Date: Thu, 6 Nov 2014 11:55:56 -0600
> From: stan@xxxxxxxxxxxxxxxxx
> To: yguang11@xxxxxxxxxxx; xfs@xxxxxxxxxxx
> Subject: Re: EIO and data corruption on XFS file system
>
> On 11/06/2014 07:03 AM, GuangYang wrote:
>> Hello,
>> While working on the storage system, I got one question in terms of the
>> XFS utilities to fix file system corruption. Basically, our storage
>> system put 3 copies of data and the system would detect data
>> inconsistency on regular basis, there are two patterns we observed so
>> far: 1) the data is corrupted which result in an EIO, 2) data is still
>> accessible but the content is changed.
>>
>> I am wondering the way to fix such issues from file system's
>> perspective, do we expect hardware failure for both cases or some xfs
>> repairing tools could help for such case?
>
> xfs_repair addresses filesystem metadata inconsistencies/corruption. It
> does not inspect file contents. If a file is corrupted xfs_repair can
> do nothing for you. If you're seeing inconsistencies in file data the
> problem is not XFS but something else, possibly hardware, as you suspect.
>
> What hardware is this? What RAID controllers?
We are using the following disk:
Disk:   sdl (hpsa0): 6.0TB (23%) RAID-0 == 1 x 6TB 7.2K SATA 300MB/s 
ATA-ST6000NM0024-1HT
and controller:
Disk-Control:   hpsa0: HP Smart Array P410, FW 6.40, Cache on 0B/512MB (R/W), 
BBU
>
> Cheers,
> Stan
>
                                          
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