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HITACHI SAN Array Presents Excessive Disks/Paths per LUN with High LUN Numbers (Doc ID 798373.1)

Last updated on APRIL 28, 2020

Applies to:

Linux OS - Version 2.6 to 2.6
Oracle VM - Version 2.1 to 2.1.5 [Release OVM21 to OVM215]
Oracle Cloud Infrastructure - Version N/A and later
Linux x86-64
Oracle VM - Version: 2.1 to 2.1.5
Linux ItaniumLinux x86-64

Symptoms

Significantly more Paths than expected are listed for LUNs on an Hitachi storage array e.g. 36 as opposed to 4.
Some devices are not shown completely.

[root@<hostname> dev]# multipath -ll
360060e8014427b000001427b001021aadm-2 HITACHI,OPEN-V
[size=56G][features=0][hwhandler=0]
\_ round-robin 0 [prio=8][enabled]
\_ 1:0:0:49155 sdu 65:64  [active][ready]


The issue is known to affect Oracle Linux/Red Hat Enterprise Linux 5/Oracle VM (OL5/RHEL5/OVM) systems, however, does not OL4/RHEL4 systems.

Changes

Changes likely to account for the issue include:

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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