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 2.6Oracle 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]
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:
- You have recently deployed OL5/RHEL5 systems that use an Hitachi storage array
- You have recently upgraded from OL4/RHEL4 to OL5/RHEL5
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |