Sun Cluster[TM] 3.x software: scsi-initiator-id setup in clusters with Sun StorEdge[TM] 3xx0 SCSI arrays

Asset ID:	1-71-1005129.1
Update Date:	2009-09-17
Keywords:

Solution Type Technical Instruction Sure

Solution 1005129.1 : Sun Cluster[TM] 3.x software: scsi-initiator-id setup in clusters with Sun StorEdge[TM] 3xx0 SCSI arrays

Related Items


Sun Storage 3310 Array
 Sun Storage 3320 SCSI Array

Related Categories


GCS>Sun Microsystems>Storage - Disk>Modular Disk - 3xxx Arrays

PreviouslyPublishedAs
207207

Description
This document shows when "scsi-initiator-id" needs to be changed in cluster
environments, with Sun StorEdge[TM] 3xx0 SCSI arrays as shared storage.

Steps to Follow
Sun now offers different types of Sun StorEdge 3xx0 SCSI arrays - listed below.
They are all qualified to be used in clusters, with Sun Cluster 3.x software.

The following, shows where to change "scsi-initiator-id" on one node of the
cluster, to avoid "scsi-initiator-id" conflict between cluster nodes, on a
shared SCSI bus:

Sun StorEdge 3310/3320 with RAID controllers;
- host SCSI channels are separated and electronically isolated by the I/O
module and the termination board of the RAID head. So, multiple nodes do
not share any SCSI bus, and "scsi-initiator-id" does not need to be
changed on any node.
Sun StorEdge 3120/3310/3320 JBOD;
- the JBOD I/O boards do not isolate host channels, so multiple nodes actually
share SCSI buses; and "scsi-initiator-id" needs to be changed on one node to
avoid conflict.

To check if multiple nodes are sharing SCSI buses(thus decide if
"scsi-initiator-id" needs to be changed):

Look at SCSI reset messages on one node, while the other node is doing SCSI
reset(e.g. reboot). Multiple nodes on a shared SCSI bus will see all the
SCSI resets done by all the nodes.

For SE3310/SE3320 arrays with RAID heads, one node will not see SCSI resets
initiated by the other node.

For changing "scsi-initiator-id" procedures, refer to Technical Instruction <Document: 1007430.1> Sun[TM] Cluster 3.0/3.1: Setting the scsi-initiator-id.

Product
Sun Cluster 3.1
Sun StorageTek 3310 SCSI Array
Sun StorageTek 3320 SCSI Array

Cluster, scsi-initiator-id, SE3120, SE3310, SE3320, minnow
Previously Published As
83565

Change History
Date: 2006-01-17
User Name: 18392
Action: Approved
Comment: Added product names, product nouns, trademarking. Did some serious re-wording - our customers want concise, to-the-point answers to their questions, rather than wordy discourses. Did some corrections and formatting for clarity, brevity and readability.
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