I have a physical server I converted to a VM. In the lsattr output, identify the dar s that list the dacs you identified in step 1 of this procedure. For each dar, type the following command to verify that affected dar attributes indicate the presence of two active dac s: After OS installation, shut down and restart test1, and you should see the two added disks with fdisk -l. Again, download the installation package from the IBM Web site see Related topics for a link and follow the documentation to install the driver.

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Do not reinstall the fibre channel cable at this time. I have had to perform this on several occassions and I thought it would be useful to share my experience with you all and although this procedure is very well detailed in the Storage Manager Installation and Support Guide, which can be viewed in PDF format by following this IBM link I thought I would copy and publish the details here. Verify or upgrade the firmware on the replacement HBA to the appropriate level by typing the following command: If you continue to use this site we will assume that you are happy with it.

ds480 Click Here to join Tek-Tips and talk with other members! Find More Posts by TB0ne. In the case of DS, when creating a logical volume, it automatically alternates controller ownership as the preferred path for load balancing.


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Multipath storage with Xen and DS4800

The new HBA is placed in the default group. If necessary, enable autorecovery of the affected dar s at this time.

The guest simply boots the first block device in the list. Now that the Xen environment is up and running, it’s time to install the drivers to access the SAN storage. Register now while it’s still free!

When you start up a Xen host, the Xen hypervisor takes control of the system first, then it loads the first guest OS, which is called the domain 0 or Dom0 in Xen lingo. Multipath drivers are not made equal: When installing the Xen tools packages, it seems to me that there is a circular dependency no matter what order I install them in, so I have to force the first package to install without dependency verification and then install the rest in rdwc order:.

Before continuing, verify that these results have been obtained. Hello, I have AIX 6.

DS RDAC need help – IBM: AIX – Tek-Tips

If two dacs are not reported for each affected dar, loss of data availability can occur. The fibre channel HBA hot swap is now complete.

Hopefully there is a fix to this otherwise, Hyper-V, here we come. Email required Address never made public. This content has been marked as final. You are commenting using your Twitter account. RedHat linux enterprise 5.


If the steps in this procedure are completed successfully up to this point, you obtain the following results:. Here is a sample. Sorry I couldn’t be of more help. What you’d advice to use, native OS multipath tools. After creating partitions and filesystems on these disks, I have this in test Naturally at this point, you’ll only see the domain 0 running.

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Techdocs: Instructions to convert DS disks from MPIO to AIX_fcparray(RDAC).

How many wwpns do you see there relating to the server you are having issues with? You can not post a blank message. At this point, both guests are fully installed and configured to access their respective virtual disks with multipath through domain 0. Multipath data access is a remedy to this issue. For each dar that you identified in step 2, type the following command: