Re: HBA connection

From: Van Thothathri (VanTh_at_online.microsoft.com)
Date: 08/30/04 

Date: Mon, 30 Aug 2004 14:25:37 -0700

Ravi,

For boot from SAN please refer
http://support.microsoft.com/support/kb/articles/q305/5/47.asp
------------------------------------------------
In Windows Server 2003 Cluster server has a switch that when enabled, allows
any disk on the system, regardless of the bus it is on, to be eligible as a
cluster-managed disk. Using this, the system disk, boot disk, pagefile disks
and any cluster managed disks can be attached to the same HBA. This feature
is enabled by setting the following registry key:
HKLM\SYSTEM\CurrentControlSet\Services\ClusSvc\Parameters\ManageDisksOnSystemBuses
0x01"

You may require this key only if you are attaching system disk and shared
disk to the same HBA. There is a storport requirement associated with this
setup. i.e. you have to use Storport for this config to work in clusters.

Details at
http://download.microsoft.com/download/7/b/5/7b555ca0-297d-4a04-a7ea-5f8b0089b249/SAN.doc

The key doesn't exist before MSCS is installed, and during the MSCS install
process you may have to recreate the key as it may get reset due to a known
issue.

---------------------------------
You may have to get storport updates if you are using RTM version of Windows
Server 2003. (KB838894) 

-- 
Van Thothathri
Windows Clustering
High Availability Microsoft Enterprise Server Products
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"ravi" <anonymous@discussions.microsoft.com> wrote in message 
news:02f101c48ed0$3a8c9510$a401280a@phx.gbl...
> Hi Everyone,
>
> We bought new IBM Blade servers and putting in production
> soon.
>
> I want to put 2 windows servers in Active/Active
> clustering. I have a basic question about the clustering
> servers, many places Microsoft recommended OS and Shared
> Disk should be connected in different SCSI cards.
>
> We have HBAs in the blade servers, Can i assign 2 LUNs (OS
> & shared disk)to 1 HBA and able to install Windows
> Clustering? Or does should I have to have 2 HBA for my OS
> LUN and Shared disk seperately?
>
> we have to connect the blade servers with EMC SAN.
>
> thank you

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