RE: [Xen-devel] sfdisk -g support in DomU

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

> Back in January there was a mail thread on this subject ( 
> http://lists.xensource.com/archives/html/xen-devel/2005-01/msg
> 00659.html
> ), however I see that blkfront still does not include ioctl 
> support for disk geometry. So, any application that uses 
> "sfdisk -g" to get the geometry of a partition, or disk, will 
> fail when run in DomU.
> 
> Is this a deliberate omission?

Most people tend to import block devices as partitions rather than whole
disks, so often there isn't a 'whole disk' device to interogate (though
I guess a partition table for it could be faked out if anyone really
cared). Importing partitions rather than whole disks makes resizing of
indidual partitions easier. 

When a whole disk is being imported, I guess it would make sense to
fabricate a geometry based on the size. Patches welcome...

Best,
Ian 

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