Oracle ZFS Storage Appliance: iSCSI LUNs are not seen by client systems

Asset ID:	1-72-1932633.1
Update Date:	2018-05-04
Keywords:

Solution Type Problem Resolution Sure

Solution 1932633.1 : Oracle ZFS Storage Appliance: iSCSI LUNs are not seen by client systems

Related Items


Sun ZFS Storage 7420
 Oracle ZFS Storage ZS5-2
 Sun Storage 7110 Unified Storage System
 Oracle ZFS Storage ZS3-2
 Sun Storage 7210 Unified Storage System
 Oracle ZFS Storage ZS4-4
 Sun Storage 7410 Unified Storage System
 Oracle ZFS Storage ZS5-4
 Sun Storage 7310 Unified Storage System
 Oracle ZFS Storage ZS3-4
 Sun ZFS Storage 7120
 Sun ZFS Storage 7320
 Oracle ZFS Storage ZS3-BA

Related Categories


PLA-Support>Sun Systems>DISK>ZFS Storage>SN-DK: 7xxx NAS

In this Document

Symptoms

Changes

Cause

Solution

References

Created from <SR 3-9632155381>

Applies to:

Sun Storage 7410 Unified Storage System - Version All Versions and later
Sun Storage 7310 Unified Storage System - Version All Versions and later
Sun Storage 7210 Unified Storage System - Version All Versions and later
Sun Storage 7110 Unified Storage System - Version All Versions and later
Oracle ZFS Storage ZS3-4 - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

New iSCSI LUNs are created on one node of a ZFS-SA cluster and some other iSCSI LUNs are created on the other cluster node.

There are 2 target IQNs.

One target IQN is for each pool - since this is an active-active cluster.

When discovering the new LUNs (new LUNs started at LUN 45) on the OVM clients, the new iSCSI LUNs are not seen.

The new iSCSI LUNs are configured with the same Host Group and Target Group as the other iSCSI LUNs.

In the OVM messages, there are messages like ...

kernel: sd 4:0:0:0: Unexpected response from lun 44 while scanning, scan aborted

Changes

Cause

The new LUNs were configured on 'this' cluster node .... LUN 44 was on the 'other' cluster node - but LUN 44 had the Target Group set to All

Views for 600144F094A3A90D0000540F52AD0019:

Data File : prop unavailable in standby

Host group : All

Target Group : All

LUN : 44

Solution

Having the incorrect Target Group caused the OVM client to discover everything up to LUN 43.

But since it was unable to discover LUN 44 down both IQNs, it aborted the discover and didn't discover any LUNs higher than LUN 43 (in this case).

The solution is to ensure all LUNs have the correct Host Group and Target Group set on the ZFS-SA.

References

<BUG:19690546> - ISCSI LUNS NOT BEING SEEN ON LINUX CLIENT

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