Solved

IBM DS3400 Load Balancing

Posted on 2009-03-29
1
1,033 Views
Last Modified: 2013-12-16
I have got an IBM DS3400 storage manager with dual controller directly attached to a IBM X series 366 server via FC HBA. The DS3400 has two logical drives and for both of these logical drives the current owner is controller A. I want to implement load balancing so that 1 logical drive's current owner is controller A and the other logical drive current owner is Controller B. Does anyone have any idea/suggestion how to implement load balancing on DS3400?

Thanks
0
Comment
Question by:solution786
1 Comment
 

Accepted Solution

by:
VittorioVeresani earned 250 total points
ID: 24052273
hi,
when you create one LV, the storage assign it to ControllerA; the next to CtrlB, next CtrlA...

Assigns, in the sense that CtrlA or B are the preferred.
If LV2 is arrigned to CtrlB (Preferred), and CtrlB fails, you see LV2 managed by CtrlA.

A LVx may be Preferred by CtrlA but, for some motivation, managed by CtrlB.

First ensure that LV1 and LV2 are preferred respectively by CtrlA and B: if it is not so,
declare for LV2 CtrlB as preferred.

But I believe this is not your situation: for my opinion you have as preferred one LV on each Ctrl,
but in this moment, both LVx are managed by CtrlA. Why ?

You have not SAN switch (directly attached) then no switch problem.
Cables all OK ?
Wich OS is used ?
BIOS FC adapter OK ? Which type ? don't load HBA failover option.
MultiPath SW loaded ? done by OS or IBM software ?

Some storage (I don't remeber if 3400 is one of these) have not automatic failback:
Suppose you have 2 LV, 2Ctrl, 2 HBA, and they are balanced.
Detach a cable: LV2 will be served by CtrlA ; re-attach the cable;
If the storage has auto-failback, LV2 will return under CtrlB control.
If it has not, you have to do manually.

bye
vic
0

Featured Post

Backup Your Microsoft Windows Server®

Backup all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

Question has a verified solution.

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

In this article, I will show you HOW TO: Install VMware Tools for Windows on a VMware Windows virtual machine on a VMware vSphere Hypervisor 6.5 (ESXi 6.5) Host Server, using the VMware Host Client. The virtual machine has Windows Server 2016 instal…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
With the advent of Windows 10, Microsoft is pushing a Get Windows 10 icon into the notification area (system tray) of qualifying computers. There are many reasons for wanting to remove this icon. This two-part Experts Exchange video Micro Tutorial s…

813 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

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now