topic Re: Luns on Windows 2008 Server in ONTAP Discussions

Luns on Windows 2008 Server

trust_shana — Thu, 05 Jun 2025 07:25:48 GMT

Gurus,

I have a LUN on Windows 2008 Server and if l got to Disk Management on the server l'm picking up two disks from a Single LUN. The FC connection from the server to the Switch is on a single port HBA. I have MPIO software installed on Windows 2008 Server? Is ok to see the LUN as two drives?

Please assist.

Re: Luns on Windows 2008 Server

radek_kubka — Wed, 15 Jul 2009 16:33:29 GMT

Hi,

(I believe your post is in the wrong place though)

It's definitely a bad thing - the host should see just one LUN. But what puzzles me is this: are you 100% sure you have just one path from the host to the filer?

IF you have more than one path then MPIO is not good enough in FC environment - you need DSM to properly maintain multi-pathing. Have a look at this:

http://communities.netapp.com/thread/4250

Regards,
Radek

Re: Luns on Windows 2008 Server

amiller_1 — Wed, 15 Jul 2009 20:29:51 GMT

Can you post a screenshot of what you're seeing?

Given a NetApp clustered system, you will see 2 paths to each LUN and you will need multipathing (MPIO) software. For iSCSI, Microsoft's MPIO is sufficient but if FC you will want NetApp's DSM.