Solved

VMware multipath configuration for a BladeCenter S SAS RAID module

Posted on 2010-09-08
5
3,205 Views
Last Modified: 2012-05-10
I'm following the instructions here to configure "Proper multipath settings for VMware and the RSSM module (43W3584) - IBM BladeCenter S "

http://www-947.ibm.com/support/entry/portal/docdisplay?brand=5000020&lndocid=MIGR-5081899

Whilst the instructions are pretty badly written, miss a few steps, and don't reflect the latest vSphere Client, I've managed to follow them and configure the LUN Policy to Fixed (VMware) and set preferred paths for each LUN.

However, I'd like some advice on whether these setting are still relevant for ESXi 4.1, and whether changing the LUN policy from "Most Recently Used (VMware)" to "Fixed (VMware)" is indeed the best / recommended configuration for a BladeCenter S.

Thanks.

Kevin
vmware-manage-paths-fixed.png
0
Comment
Question by:Kevin_Leadbeater
[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
  • 3
  • 2
5 Comments
 
LVL 62

Expert Comment

by:gheist
ID: 33634432
You can set to "fixed" at the times you need to change particular cable, otherwise either of others is fine.
Probably re-using last path was of value for old FC or faraway iSCSI, but normally no difference.
0
 
LVL 5

Author Comment

by:Kevin_Leadbeater
ID: 33634797
The Path Selection options and Storage Array Type have both changed in ESXi 4.1 compared to 4.0.

In the Path Selection menu, i now see an extra entry (the top one)

VMW_PSP_FIXED_AP
Most Recently Used (VMware)
Round Robin (VMware)
Fixed (VMware)

And the Storage Array Type is now: VMW_SATP_ALUA rather than VMW_SATP_DEFAULT_AA in ESXi 4.1.

Can anyone explain what these differences mean or imply?  And (ideally) give me recommendations of what i should choose.


I see some information here, but this is all a bit alien to me...

http://www.yellow-bricks.com/2009/03/19/pluggable-storage-architecture-exploring-the-next-version-of-esxvcenter/

http://www.yellow-bricks.com/2009/09/29/whats-that-alua-exactly/

Thanks.
0
 
LVL 62

Accepted Solution

by:
gheist earned 500 total points
ID: 33634960
Fixed tries default path first
MRU tries last path first
RR tries another path first

makes no difference in modern FC or ethernet.
0
 
LVL 5

Author Closing Comment

by:Kevin_Leadbeater
ID: 33902670
I'd still would like to see IBM response to this question, but it seems they are still unwilling to provide support for ESXi 4.1 on a BladeCenter S.
0
 
LVL 62

Expert Comment

by:gheist
ID: 33908617
They support:
IBM vCenter Management Plug-in is a VMware vCenter plug-in that provides integrated management of IBM storage subsystems within vCenter

On your small scale installation you should rely on vmware support.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

In this step by step tutorial with screenshots, we will show you HOW TO: Enable SSH Remote Access on a VMware vSphere Hypervisor 6.5 (ESXi 6.5). This is important if you need to enable SSH remote access for additional troubleshooting of the ESXi hos…
This article outlines why you need to choose a backup solution that protects your entire environment – including your VMware ESXi and Microsoft Hyper-V virtualization hosts – not just your virtual machines.
This Micro Tutorial steps you through the configuration steps to configure your ESXi host Management Network settings and test the management network, ensure the host is recognized by the DNS Server, configure a new password, and the troubleshooting…
This video shows you how easy it is to boot from ISO images for virtual machines with the ISO images stored on a local datastore on the ESXi host.

734 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