Re: [Xen-devel] Creating partitions on domain U

[Mark Williamson <Mark.Williamson@xxxxxxxxxxxx>]

> Does a guest (domain U) have the ability to create partitions on a virtual
> disk drive (/dev/hda1)?   For example, can I use parted/fdisk to create my
> own partitions on a VBD from within domain U?

Yup, should work fine, with the caveat that it's a bit more fiddly viewing 
these "partitions" in dom0 (unless the VBD corresponds to a whole disk) 
because it won't be expecting to see partitions in a file / another 
partition.  I don't know what dom0 would make of partitions in LVM volumes.

> Also, does the XEN front-end block driver support any IOCTLs?  I looked in
> the code and it explicitely fails all IOCTLs received from the kernel.

Generic block device IOCTLs will be provided by the kernel (whereas in 2.4 the 
driver had to do more of this work itself).  Anything else (e.g. 
CD-ROM-specific ioctls) isn't supported.

Cheers,
Mark


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