iSCSI: LUs ownership/iSCSI MIB

[Pierre Labat <pierre_labat@hp.com>]

Mark (bakke),


Where
=====
In the MIB draft, in the chapter

5.1.  Overall MIB structure


There is:

"Therefore, LUs are "owned" by Targets, and LUNs are owned
   by Sessions."

Problem
======

If a LU is owned by only one target how do you deal with an
active-passive
configuration such as:
active link: portal IP1, LUN=1
passive: portal IP2, LUN=2 (but it is the same LU as the one accessed
through the active link)

As the various portals of a target provide the same LUN view, IP1 and
IP2 can NOT
be two portals of the same target.

In this case we would need two target names, one for the active link and
one for the passive.

But if a LU can be owned by only one target we can't do it.
I think SAM doesn't allows a LU to be shared by two targets and that
seems
to be reflected in the chapter "5.1.  Overall MIB structure".

Solution
======
In the case of an active-passive configuration, the target must
guarantee the same
view on the two paths (active and passive).
Is it a problem for whose who build such targets?


Regards,

Pierre