Re: [Xen-devel] [PATCH 0/6] pvSCSI (SCSI pass through) driver

[Aaron Dailey <Aaron.Dailey@xxxxxxx>]

Stephen C. Tweedie wrote:
> Hi,
>
> On Tue, 2007-10-30 at 19:39 +0900, Jun Kamada wrote:
>
> Is this using the same syntax for HBA reservation that we used to have,
> ie. simply enumerated using the scsi host number on the dom0?
>
> If so, that is rather fragile.  The scsi host number can change from
> kernel to kernel depending on HBA driver probe order and PCI bus
> enumeration order.  It changes when hardware is rearranged.  And how do
> we deal with migrate, when we'll need to select a completely different
> HBA on a different host?
>
> Selecting the HBA by scsi host number is good enough for a demonstration
> that the code works, but I don't think it's going to be robust enough
> for production deployment.  
>
> Also, has there been any progress towards exposing individual LUNs to
> the guest rather than a whole HBA?
>   
NPIV can help here for FibreChannel devices.  You can create a virtual 
NPIV adapter, and export exactly the LUNs/devices you want to that adapter.
It's a different approach then exporting LUNs, but similar result.

> Cheers, 
>  Stephen
>
>
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>   

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