Creating an LPAR (Logical Partition) on an IBM Power Systems AIX server involves using the Hardware Management Console (HMC) to allocate system resources to a new logical partition. Here’s a step-by-step guide:

Step 1: Access the Hardware Management Console (HMC)

1. Log in to the HMC using your admin credentials.
2. Navigate to the managed system (your IBM Power server).
3. Ensure the HMC has network access to the managed system.

Step 2: Verify Resources

• Check available processors, memory, and I/O adapters.
• Decide how many resources you want to assign to the new LPAR:
  • Processors: Dedicated or shared
  • Memory: Minimum and maximum size
  • I/O adapters: Virtual I/O (VIO) or dedicated

Step 3: Create a New LPAR

1. In the HMC, go to the Partitions tab.
2. Click “Create Partition” or “New LPAR”.
3. Enter LPAR properties:
   • Name
   • Profile (choose default or custom)
   • Partition type: AIX, IBM i, or Linux
   • Shared/Dedicated processors
   • Memory allocation
   • I/O adapter configuration (virtual or dedicated)

Step 4: Configure Virtual I/O (Optional but Recommended)

• If using Shared Storage or Network adapters, configure the VIO server:
  • Assign virtual SCSI adapters for storage
  • Assign virtual Ethernet adapters for networking

Step 5: Create LPAR Profile

• The LPAR profile defines the configuration and resources.
• Save the profile to the HMC.
• Profiles allow you to start or modify the LPAR later without reconfiguring hardware manually.

Step 6: Activate the LPAR

1. Select the new LPAR profile.
2. Click “Activate” to start the LPAR.
3. Monitor the startup for any hardware or configuration errors.

Step 7: Install AIX or OS

• Once the LPAR is active, install the AIX operating system (or other OS, if applicable).
• Use network or virtual media to install the OS.
• Configure IP addresses, hostname, and services as required.

Step 8: Verify the LPAR

• Log in to the LPAR after boot.

• Check CPU and memory allocation using AIX commands:

  lparstat -i      # LPAR info and status
  lsattr -El sys0  # System attributes, memory, CPU
  

• Check network and storage connectivity if using virtual adapters.

Tips

• Use dynamic LPARs to adjust memory and CPU without restarting the LPAR.
• Always maintain a VIO server if you are using virtualized I/O.
• Keep LPAR profiles organized and version-controlled for quick recovery or duplication.

✅ In short:

1. Log in to HMC → select managed system
2. Check resources → create new LPAR → assign CPU, memory, and I/O
3. Save the LPAR profile → activate → install OS → verify configuration