Re: FYI: RAID5 unusably unstable through 2.6.14

[Phillip Susi <psusi@cfl.rr.com>]

Martin Drab wrote:
> On Fri, 3 Feb 2006, Phillip Susi wrote:
>   
> > It looks like the problem is in that controller card and its driver.  Was this
> > a proprietary closed source driver?
> >     
> No, it was the kernel's AACRAID driver (drivers/scsi/aacraid/*). And I've 
> consulted that with Mark Salyzyn who told me that it is the problem of the 
> upper layers which are only zero fault tollerant and that driver con do 
> nothing about it.
>   
That's a strange statement, maybe we could get some clarification on 
it?  From the dmesg lines you posted before, it appeared that the 
hardware was failing the request with a bad disk sense code.  As I said 
before, normally Linux has no problem reading the good parts of a 
partially bad disk, so I wonder exactly what Mark means by "upper layers 
which are only zero fault tollerant"?


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