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Monday, February 26, 2024

How to Add LUN to a Windows Server 2012 R2 Machine using EMC VNX5300

Start – Search – iSCSI Initiator


Open It – Discovery

Click on Discover Portal


Add the IP of your Storage – Leave the Default Port


Now Connect to the pairs like a4/b4 and a5/b5 – whichever is assigned


While you Connect make sure you give a Check on “Enable Multi-path”


Now iSCSI connector is ready on the Windows Server 2012 R2.


Now login to VNX

Click on Hosts –  Initiators


Search for the initiators machine name from where you connected


Now Choose one of the initiators and click on register

Choose Initiator Type – CLARiiON/VNX

Enter the new host name and IP address

Click on ok

Now do the Same process of registering the initiator record for all the other ones.


Now host should be listing in the host list . if its not listing refresh the host list  . You can logout and login to refresh it in worst case



Creating LUN –


Now Click on Hosts – LUNS



Click on Create – In the bottom

Enter the User capacity you required – am just adding a witness storage for hyper v cluster so making it a 2 GB drive

Click on Name – Type the LUN Name


Click on the advanced TAB

Choose default owner –SPB – (Its my case )


Click on Apply now LUN is ready


Creating Storage Group

Hosts – Storage Groups


Click on Create Storage Group – Enter a friendly name


Now Choose Yes


Now Choose the LUN we created now ADD the LUN



Click on the Hosts Tab –

Add the appropriate machine from the Available Hosts


Now Click  on Ok


iSCSI connector is configured / LUN is created / Created Storage Group Add the LUN and hosts to be connected it


Now Make Sure you Install the  Multipath I/O Feature on the server


Start – Search – MPIO

Add appropriate Vendors – Click OK



Now the Disk should have showed up on the your disk manager

Start – Run – Diskmgmt.msc

Right click on the disk – Click on Online


Now right click again – Initialize the disk – Choose GPT

Make it GPT – Cause MBR cannot be extended more than 1TB (Up to you)


Now right click on the Disk again – Convert it to a Dynamic Disk


Right click again Click on “New Simple Volume”


Make it NTFS


Now Drive has been added from iSCSI Storage VNX 5300


Satheshwaran Manoharan
Satheshwaran Manoharanhttps://www.azure365pro.com
Award-winning Technology Leader with a wealth of experience running large teams and diversified industry exposure in cloud computing. From shipping lines to rolling stocks.In-depth expertise in driving cloud adoption strategies and modernizing systems to cloud native. Specialized in Microsoft Cloud, DevOps, and Microsoft 365 Stack and conducted numerous successful projects worldwide. Also, Acting as a Technical Advisor for various start-ups.

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    • Dynamic disks offer greater flexibility for volume management because they use a database to track information about dynamic volumes on the disk and about other dynamic disks in the computer. Because each dynamic disk in a computer stores a replica of the dynamic disk database, for example, a corrupted dynamic disk database can repair one dynamic disk by using the database on another dynamic disk. The location of the database is determined by the partition style of the disk. On MBR partitions, the database is contained in the last 1 megabyte (MB) of the disk. On GPT partitions, the database is contained in a 1-MB reserved (hidden) partition.


  1. Dear Satheshwaran,
    I have a local disk c: which is a basic disk and 2 spanned volumes e: and f: respctvly.I am talinking about a scenario when I found the spanned volumes which are derived from the IBM storage, got unmounted and and I could nt see the disks in the diskmanagement.msc , NOW
    Q1. If i rescan the disk they are not visible, hence do i unmount it from the storage and remount?

    Q2 I f I remount the disk , what happens with the spanned volumes? DO I lose data?

    Q3 If yes , what is the best practice to do it?

    Appreciate your patience and time


    • Make sure its connected to the server. if you couldn’t connect it . try connecting with some other host and retrieve the data.
      I strongly feel. the host is not connected.

  2. I am trying to rigister an intiator for iscsi lun, if I select intiator type clariion/vnx, it didn’t allow me, the ok button has not activated unless I select cellera as intitaor type.


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