Hi, I am having trouble getting some definite information as to whether or not xen (and in particular, xvm on an OpenSolaris dom0) does currently support emulated scsi (disk) devices (ie provide an HVM scsi target driver). I''ve found a nice presentation at http://www.xen.org/files/xensummit_4/Xen_Summit_8_Matsumoto.pdf, but also a lot of references stating that SCSI disk emulation is not available. I would greatly appreciate a short summary from an expert. Thank you, Nils
Nils Goroll wrote:> > I am having trouble getting some definite information as to whether or > not xen (and in particular, xvm on an OpenSolaris dom0) does currently > support emulated scsi (disk) devices (ie provide an HVM scsi target > driver). >What domU OS are you thinking of? E.g. Windows PV drivers emulate SCSI targets, since all disks are SCSI as far as the Windows storage stack is concerned. Paul -- ==================================Paul Durrant http://www.linkedin.com/in/pdurrant ===================================
Paul,>> I am having trouble getting some definite information as to whether or >> not xen (and in particular, xvm on an OpenSolaris dom0) does currently >> support emulated scsi (disk) devices (ie provide an HVM scsi target >> driver). > > What domU OS are you thinking of? E.g. Windows PV drivers emulate SCSI > targets, since all disks are SCSI as far as the Windows storage stack is > concerned.I am thinking of Solaris domUs as well. I wanted to find out if necessary components are available to even consider running a fully firtualized OHAC development environment, which would need shared SCSI storage. I am aware that this is much more than simple H/W SCSI emulation, but as a start I would like to understand what exists to possibly start building upon. Nils
Nils Goroll wrote:> Paul, > >>> I am having trouble getting some definite information as to whether >>> or not xen (and in particular, xvm on an OpenSolaris dom0) does >>> currently support emulated scsi (disk) devices (ie provide an HVM >>> scsi target driver). >> >> What domU OS are you thinking of? E.g. Windows PV drivers emulate SCSI >> targets, since all disks are SCSI as far as the Windows storage stack >> is concerned. > > I am thinking of Solaris domUs as well. I wanted to find out if > necessary components are available to even consider running a fully > firtualized OHAC development environment, which would need shared SCSI > storage.We don''t support the PV scsi drivers today.> I am aware that this is much more than simple H/W SCSI emulation, but as > a start I would like to understand what exists to possibly start > building upon.I would suggest asking the clustering discussion list what needs to be done to setup a cluster between two domUs. http://opensolaris.org/jive/category.jspa?categoryID=110 MRJ