Welcome to the World of IBM Virtualization


"Everything can be virtualized except the reality!!!"


The main idea behind creating this blog is to provide profound insight into managing IT infrastructure running primarily on IBM AIX and the below technologies as well.

To show your support, become a follower of this blog.

1. Tivoli Storage Manager


2. HACMP (POWERHA)


3. VCS (Veritas Cluster Service)


4. Oracle on AIX


5. SAP (R/3, Enterprise portal, CRM, BW) on AIX


6. Informatica on AIX


7. Websphere on AIX




I'll also provide tips, techniques and best practices followed in configuring IBM VIO servers and Virtual IO client LPARS (logical partitions) and present it in a comprehensible way for system architects and AIX beginners.




Enjoy reading my posts and have intellectual fun.

Monday, October 3, 2011

IBM VIO Virtual SCSI Disk configuration

Using VIO server, a disk or a logical volume or a volume group can be shared to a client LPAR as a "VIRTUAL SCSI DISK"

Steps to configure Virtual SCSI:
1. Choose a disk (physical volume) in the VIO server. For example hdisk1.

2. Modify LPAR profile of the VIO server to add a virtual server SCSI adapter. Specify a unique adapter slot number and also specify connecting client partition and slot.

3. After adding the virtual scsi adapter and activating the VIO server, you should see a virtual scsi server adapter vhost#. For example vhost0.

4. Modify the client LPAR profile to create new virtual scsi adapter and specify the connecting server partition as the VIO server and server SCSI adapter slot.

5. Then to create the mapping in the VIO execute the following command.

 mkvdev -vdev hdisk1 -vadapter vhost0 -dev client1_rootvg

In Dual VIO setup with a powerpath device coming from SAN:

Let's assume hdiskpower0 is shared between vioservera and vioserverb.

Follow the above steps 1-3 for both the VIO servers.

Execute the following on both the VIO servers:
a. Switch user to root using the command "oem_setup_env"
b. chdev -l hdiskpower0 -a reserve_lock=no hdiskpower0
c. mkvdev -vdev hdiskpower0 -vadapter vhost0 -dev client1_rootvg
d. Perform the step-4 twice for each VIO servers.

The above steps will create two virtual scsi path for the same physical volume. You may login to the client and execute "lspath" to view the vscsi path to the virtual SCSI device.

To verify the mappings in the VIO server, use the command lsmap -all.

Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)