RE: ServeRAID Seeing DADSI Devices

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I believe this is a bad solution. If exposing an element of a RAID array
( at any level ), now or ever in the future, allows anyone or anything
the ability to touch the physical DASDI device, it has violated the most
sacred rule of a RAID subsystem because it has jeopardized the data's
integrity. Nothing should ever have the ability to touch a drive's data
( attached to a RAID adapter ) except the adapter's firmware.

That being said ( and soapbox dismounted ), I will create a patch that
sets the no_uld_attach flag - if that's the implementation the community
thinks is appropriate.

Jack

 

-----Original Message-----
From: Christoph Hellwig [mailto:hch@xxxxxxxxxxxxx] 
Sent: Wednesday, February 01, 2006 5:25 AM
To: Hammer, Jack
Cc: linux-scsi@xxxxxxxxxxxxxxx; James.Bottomley@xxxxxxxxxxxx
Subject: Re: ServeRAID Seeing DADSI Devices

On Tue, Jan 31, 2006 at 01:17:55PM -0500, Jack Hammer wrote:
> A critical thing the ServeRAID driver MUST do is hide the physical 
> DASDI devices from the OS. It does this by intercepting the INQUIRY
commands.

No, it must not.  What itu should do instead is to set the no_uld_attach
flag.


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