How To Remove SAN Attached LUNs from RHEL 5 Servers Using powermt

Introduction It is one of those rare occasions where you get to reclaim SAN attached storage instead of giving more. From the EMC side of it you would think no problem. Remove the host from the storage group and un-mount and re-scan on the host and all is good, right? Well no, up rises device in use or not found and powermt check command won’t work. So how do we do it? Read on and see. Steps Several... read more

How To Move Windows 2008 R2 or 2012 R2 MSDTC Witness Disk to new SAN drive

This post explains how to move the MSDTC SAN drive to another drive on a Windows 2008 / 2012 cluster. For the most part you are deleting the existing cluster defined service and recreating pointing to the new drive. Before moving to the new storage drive assigned to MSDTC you will need to gather the following information. MSDTC ip address New and old SAN drive’s Current cluster service definition You also... read more

Finding the World Wide Name (WWN) in Windows Server 2008 and 2008 R2

You know how it is, you just built that new server and you need to attach storage to the Qlogic or Emulex card and the storage guys are asking for the WWN (World Wide Name) and if this is a first time you start to scratch your head, no worries because Microsoft has added that little piece of info right at your finger tips. In Windows Server 2008 or 2008 R2, you can use “Storage Explorer” to... read more