Hi vipin and all,

Now Host OS version is updated in Storage side. I did the followings as per EMC TSE's suggestion,

Steps to perform:

1. Disable agent push feature in for registration in ESXi.

• In the vSphere Client, select the host in the inventory.
• Click the Configuration tab and click Advanced Settings under Software.
• Select Disk in the left panel and scroll to Disk.EnableNaviReg.
• Change the default value to "0".
• Reboot the ESXi host for the changes to take effect.

  2.  De-register the host initiators in connectivity status tab.

  3.  Restart the Management Server.

Note: This procedure must be performed on both storage processors to be effective!

• Open a new browser window.
• Type in the address bar-> http: // xxx.xxx.xxx.xxx/setup
• Where xxx.xxx.xxx.xxx is the IP address of the storage processor (SP A).
• When the screen has loaded, type in the Username and Password used to access Navisphere/Unisphere User Interface (UI).
• Once logged in, click the "Restart Management Server" button.
• Once the page has loaded, click the "Yes" option, and then click "Submit."
• Follow the same steps for SP B.

4.  Re-enable the Disk.EnableNaviReg = 1

1. Try to register the host initiators back.

Please click "Update now" for some times in Storage Array. Now OS version will updated.

Note: ESXi host reboot causes downtime. In my environment i moved virtual machines to another hosts through vmotion.