?
Solved

Linux server does not see SAN LUNs when moved to new fibre switches.

Posted on 2014-03-11
4
Medium Priority
?
547 Views
Last Modified: 2014-03-17
We have a Linux server running Oracle Enterprise Linux 5.7 and it is running on a HP blade in a HP C7000 enclosure connected to fibre switch FSW01.

The Linux server is in a RAC cluster with another node. Everything work OK in this setup.

We need to move this server to another rack, into a brand new HP C7000 enclosure on a new fibre switch. The new fibre switch has been added to the existing fabric domain and the handful of Windows & VMware servers we have moved to the new rack all function well wrt SAN connections,

However, when we move the Linux server to the new rack/enclosure, although the EMC CX4-240 SAN shows the server as Logged in and Registered, Linux cannot see the LUNs presented to it.

We had to move the Linux server back to its original location to get it to see the LUNs again.

The old fabric switches are EMC DS5300Bs and the new ones in the new row are EMC DS6510Bs.

It seems obvious that the new fibre switch is causing the issue, but I cannot see it as being a zoning issue so what could be the problem here?
0
Comment
Question by:rexne1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 79

Accepted Solution

by:
arnold earned 750 total points
ID: 39922277
You need to make sure that the zoning on the new switches and the ports are correctly matched.

If this system is multi-patched, moved a port at a time.

Check the LUNs allocated and how they are zoned on the OLD switch, then mark the SW port and the HBA that you will match

Check the SAn's LUN configuration in comparison to the others.
0
 
LVL 13

Assisted Solution

by:Sandy
Sandy earned 750 total points
ID: 39923077
Zoning issue... Please check the LUN id's and wwn mapping.

TY/SA
0
 
LVL 9

Expert Comment

by:Shani Basha
ID: 39923245
If you are sure that the zoning in the new switches matches the new ports and the wwn, then ideally you need to check the compatibility of HBAs with the EMC DS6510Bs. You may need to update the firmwares.
0
 

Author Comment

by:rexne1
ID: 39935648
We completely removed all zoning and redid it all and it works fine now.
0

Featured Post

Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article we will learn how to backup a VMware farm using Nakivo Backup & Replication. In this tutorial we will install the software on a Windows 2012 R2 Server.
The business world is becoming increasingly integrated with tech. It’s not just for a select few anymore — but what about if you have a small business? It may be easier than you think to integrate technology into your small business, and it’s likely…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…
Suggested Courses
Course of the Month13 days, 11 hours left to enroll

800 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question