RE: LU access through an iSCSI session

[meth@il.ibm.com]

There should be no problem. It is similar to the case where there are 2
different SCSI busses connecting a host to a controller. Each iSCSI session
is like a separate virtual SCSI bus. The LU names for the same device that
is reached via the different paths may be different. The way for the host
to tell that they are actually the same device is though the Vital Product
Data, which uniquely identifies the LU.

- Kalman

Robert Snively <rsnively@Brocade.COM> on 21/09/2000 18:42:44

Please respond to Robert Snively <rsnively@Brocade.COM>

To:   Kalman Meth/Haifa/IBM@IBMIL, Pierre Labat <pierre_labat@hp.com>,
      ips@ece.cmu.edu
cc:
Subject:  RE: LU access through an iSCSI session





>  LU numbers are identical across all of the TCP connections of a
>  single iSCSI session.

This is an intriguing concept.  At present, SCSI does not require
logical units to have the same LUN if they are accessed through
different NICs.  However, present SCSI is essentially one NIC per session.

If you have an iSCSI session using NIC A and NIC B and a second session
using NIC B and NIC C as physical paths, by this definition,
NIC B could have two different LUNs for the same logical unit, one
from each session.

That should not be a problem, right?