Thanks Allen
I sent in a request for the software. I don't have the hardware, but I
can install the software on an image and read the manuals.
In the Getting Started with zSeries Fibre Channel Protocol Redpaper,
which was for z/800, z/900 processors, it answered my question.
There are 240 subchannels defined on a FCP port. By giving one
subchannel per Linux image, effectively limiting the number of Linux
images that have access to FCP devices, all Linux images can have access
to the devices on the FC SAN.
I think 240 zLinux images will be sufficient, for now.
I also see how they are mapped, from zLinux, to VM, to IOCP, to WWPN
and so on, and how the FC SAN switch works (reminds me of an Escon
Director).
Tom Duerbusch
THD Consulting
(all you really ever needed was a 370 mode processor and bus and tag
devices)
[EMAIL PROTECTED] 10/2/2006 6:09 PM
On Monday, 10/02/2006 at 04:41 EST, Tom Duerbusch
[EMAIL PROTECTED] wrote:
Not on a z9z/890...
Industry-standard N_Port ID Virtualization (NPIV) on the z9 is needed
if
you want to apply zoning and LUN masking (FC access controls) to
virtual
machines and/or LPARs just as they are for discrete systems. With
NPIV,
each FCP subchannel, rather than chpid, is assigned a unique WWPN.
Matching support in the local FC switch is required.
On a z890 and z990 you can use the Linux-based FCP LUN Access Control
utility to control guest/LPAR access to WWPNs and LUNs. Even though
the
other systems and switches see just one WWPN per FC chpid (and no
special
switch support is needed), the utility instructs the FCP adapter to act
as
a gatekeeper. Read more about it on ResourceLink at
https://www-1.ibm.com/servers/resourcelink/hom03010.nsf/pages/fcpaccumain?opendocument.
(You get to this by navigating first to Tools and then selecting
Configuration Utility for FCP LUN Access Control in the first
column.)
Alan Altmark
z/VM Development
IBM Endicott
