On 05/25/2011 03:17 PM, Christoph Hellwig wrote:
On Fri, May 20, 2011 at 07:37:30PM +0200, Paolo Bonzini wrote:
On 05/20/2011 06:14 PM, Christoph Hellwig wrote:
I don't quite understand what you mean with path here. It doesn't
seem to map to any SAM concept, nor does it seem to be related
to traditional multipathing.
It's what SAM calls a "bus identifier" in the description of LUN addressing
modes.
Ok, so it more or less translates to the concept of a "channel" in
the Linux SCSI subsystem.
Yes.
It would help if you could explain the concept
in a bit more detail in a comment. Or in fact not bother with it at all,
which should be easy if we never present hierachial LUNs.
Unfortunately spapr_vscsi requires hierarchical LUNs. The OpenFirmware
code starts by sending out INQUIRY messages to channel 0/1/2/3/4/5/6/7
target 0 LUN 0 (it doesn't recognize other targets or LUNs as far as I
can see). So if you want to have a CD-ROM and a HD on your virtual
machine, and you want your HD to keep its name both during the
installation process and afterwards, you pretty much have to use channel
0 for the HD and another channel for the CD-ROM..
Paolo
