RE: Disk naming (Was Re: [Xen-devel] [PATCH] Guest bootloadersupport [1/2])

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> Things start getting odd if you start mixing anything that 
> natively shows up as scsi with a vbd scsi, though, don't 
> they?  

Yep, it's a bit skank. I've had this before when I had a guest that was
moutning an iscsi target directly, and also a partition on the local
scsi disk via a vbd. I had to import the local scsi disk partition as
/dev/hda1 as the iscsi needed the sda.

I think we still register the xda major/minor for such eventualities.

Users really like to be able to boot the same file system both native
and on Xen without modifications, so I think this requirement wins out
for the moment.

Perhaps in preparation, vendors could make their installers 'xda' aware?

[Hmm, we should probably officially register the major also. Anyone know
how to go about this? Or better, do it for us?]

> And upstream has been fairly resistant to other !scsi 
> or !ide devices sitting on those devices.  I've had this 
> argument with Jeff Garzik before about a few of the esoteric 
> SATA drivers that don't even pretend to be scsi.  And things 
> like partitioning tools and hardware probing will start 
> showing more problems with ioctls not working as that starts 
> to show up.

Yep, we might hit resistance. Let's hope no-one reads our drivers too
closely :-)

Ian


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