If they are not Optimal, verify that any drives that are part of the subsystems involved with hot swap process are not listed in the Recovery GURU. For each dar, type the following command to verify that affected dar attributes indicate the presence of two active dac s: Within each guest DomU , there are some lightweight device drivers for accessing virtual block devices and virtual network devices; they are called frontend drivers to distinguish them from the heavy-lifting backend drivers running in Dom0. To see which modules are loaded in your Linux system, use the commands lsmod and modinfo for module information. The defective HBA is removed from the system.
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EMC Community Network – DECN: PowerPath for DS
Please if you can tell me where to find the doco to understand all this RDAC thing, how it has been configured on aix etc The output is similar to the following example: Red Flag This Post Please let us know here why this post is inappropriate. In the lsattr command output, verify that the second word is no. The following lines in multipath. Each host port needs to be able to see each subsystem port no matter what.
Verify or upgrade the firmware on the replacement HBA to the appropriate level by typing the following command: Introduction and Implementation Guide. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.
CheKim Chhuor Published on March 04, Type the following command: In my case, dm You are commenting using your Twitter account. Modern operating systems also provide their own multipath driver, but make sure it has been certified by your storage vendor before using it.
Barely any information on this out there, so I am putting it down here mostly for my own future reference, but if anyone wants it, here ya go disclaimer against anything bad and all. To see the new disks, you can run fdisk -l and optionally use fdisk to create partition on them.
RedHat Enterprise 5 + IBM BladeCenter + No RDAC for IBM DS – Teh Knowledge
The procedure goes like this:. You can use xentop for this as well. Setting up the Xen hypervisor and domain 0 is straightforward.
If the default group has hdisks assigned to it then the HBA will generate a new dar and dac, which will cause a split. For each dar, type the following command to verify that affected dar attributes indicate the presence of two active dac s: For my virtual network, I bound it to the eth0 adapter specifically.
For each DS storage subsystem that is affected by the hot swap, complete the following steps to map the worldwide port name WWPN of the HBA to the storage subsystem:. I don’t believe it’s a zoning issue.
If they are not Optimal, verify that any drives that are part of the subsystems involved with hot swap process are not listed in the Recovery GURU. LUN 0 unowned So, any interruption to one of the access path does not affect storage access from the host.
The new HBA is placed in the default group. Now that Xen is running, you need to install some tools to interact with it.
How-to: Hot-Swap a HBA with RDAC Failover
Then, close the Host Port Information window. In the Enterprise Management window, verify that the storage subsystem s are Optimal.
Can you help me out to find out the new luns allocated and to be able to create a new vg with this new luns? My VMM is showing this now:. The output looks similar to the following example: Before we start please be aware of the following: When you start up a Xen host, the Rsac 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.
I really don’t know how she puts up with me.