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"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.

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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.

Wednesday, July 25, 2012

DLPAR: Removing I/O Adapters in AIX using HMC

Unlike removing CPU or Memory through Dynamic LPAR operation, removing physical I/O adapters requires few additional steps at the OS level. Each physical I/O adapters do have a parent PCI device and they belong to a slot. To remove an IO adapter, PCI and its child devices and the holding PCI I/O slot need to be removed first.

Steps are detailed below.

In the following example, device fcs0 is removed through Dynamic LPAR operation.

1. Use  lsdev -Cl fcs0 -F parent to find the parent pci device. Lets assume it returns "pci2"

2. Use lsslot -c slot or lsslot -c pci to find the respective slot. e.g. U001.781.DERTRGD.P1-C3

3. Remove pci and child devices. Devices shouldn't be busy. i.e. for fcs devices, volume group must be varied off and for ent devices, network interfaces
must be down.

Use the following command to remove them: rmdev -Rdl pci2

4. After removing the devices, respective slot has to be removed using
"drslot -r -s U001.781.DERTRGD.P1-C3 -c pci "

5. Now, Go to HMC and perform the DLPAR physical IO adapter remove operation. Slot must be listed in the DLPAR window.
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