Re: [BUG] scsi: hpsa: how to destroy your files

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Le vendredi 02 septembre 2011 à 11:39 +0200, Eric Dumazet a écrit :
> Le jeudi 01 septembre 2011 à 16:50 -0500, Jon Mason a écrit :
> 
> > I believe modifying the MRRS values is what is causing the issues.
> > Can you try the attached patch and verify that it also resolves the
> > issue?
> 
> I tested this patch and can confirm this solves the corruption problem.
> 
> But my disk is _much_ slower than before
> 
> # hdparm -t /dev/sda1
> 
> Before :
> 
>  Timing buffered disk reads: 254 MB in  3.02 seconds =  84.16 MB/sec
> 
> After :
> 
>  Timing buffered disk reads: 120 MB in  3.04 seconds =  39.42 MB/sec

Hmm, this speed regression is probably old : the 84MB/s was with the
standard debian 6.0.2 kernel (2.6.32-5-amd64)


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