From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Darrick J. Wong" <djwong@us.ibm.com>
Subject: Re: [PATCH] serverworks should not take ahold of megaraid'd controllers
Date: Fri, 22 Jul 2005 16:17:15 -0700
Message-ID: <42E17E7B.6090805@us.ibm.com>
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Arjan, Alan:

I didn't know that dmraid supports MegaIDE nowadays.  Thanks for the
tipoff, and I apologize for the unnecessary traffic.  I'll look into dmraid.

--D

Alan Cox wrote:
> On Iau, 2005-07-21 at 15:37 -0700, Darrick J. Wong wrote:
> 
>>I've noticed what might be a small bug with the serverworks driver in
>>2.6.12.3.  The IBM HS20 blade has a ServerWorks CSB6 IDE controller with
>>an optional LSI MegaIDE RAID BIOS (BIOS assisted software raid, iow).
> 
> 
> With a binary only proprietary driver.
> 
> 
>>(ServerWorks) to IBM.  However, the serverworks driver doesn't notice
>>this and will attach to the controller anyway, thus allowing raw access
>>to the disks in the RAID.  An unsuspecting user can then read and write
>>whatever they want to the drive, which could very well degrade or
>>destroy the array, which is clearly not desirable behavior.
> 
> 
> It may be appropriate for some vendor situations but it isn't
> appropriate for the base kernel to default to assuming the user wants to
> use binary only drivers instead of dmraid. Especially as the raid
> formats for this hardware are partially known despite no assistance I
> know of from the vendor.
> 
> Alan
> 
> 

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