Re: [Qemu-devel] [PATCH 0/2] scsi: enclosure support

[Hannes Reinecke]

On 08/03/2017 05:10 PM, Paolo Bonzini wrote:
> On 03/08/2017 15:26, Hannes Reinecke wrote:
>> Hi all,
>>
>> due to a customer issue I've added simple subenclosure support
>> to the SCSI emulation. The patch simply converts the current invisible
>> LUN0 into an enclosure device; existing setups using LUN0 as disks or
>> CD-ROMs will not be affected.
> 
> What is the issue exactly?  That is, for what is it necessary to have a
> dummy enclosure?
> 
Well, stock linux displays some very interesting error messages for
these types of enclosures.
Which was the prime mover for doing this.

> I agree with Dan that this need machine type compatibility gunk.  For
> example, could the new device affect /dev/sgN numbering?
> 
Yes, indeed it would.

What about a new option to the scsi driver?
With that each user could selectively enable it, and we wouldn't need to
worry with machine type compability...

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Teamlead Storage & Networking
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