CPU Entitlement is a setting in the LPAR profile that defines the amount of guaranteed CPU time allocated to an LPAR. This setting is important for workloads that require a steady level of performance, as it guarantees that the LPAR will always have access to a certain percentage of the processing power on the managed system. Reference: IBM AIX v7 Administrator Specialty Study Guide.

CPU Entitlement in AIX refers to the guaranteed amount of CPU time that is allocated to a logical partition (LPAR). It ensures that the LPAR receives a specific share of the processor resources, regardless of the load on the system. This setting is crucial for ensuring that critical applications have the necessary CPU resources to perform optimally. It is different from the total number of virtual CPUs configured, as it represents a minimum guarantee rather than the maximum potential CPU usage. References : IBM AIX Documentation - CPU Entitlement

The reclstat command is used to obtain information about the space reclamation requests generated by the Logical Volume Manager (LVM). This command provides details on space reclamation activities, helping administrators manage and optimize disk space utilization. References := IBM AIX reclstat Command Documentation

An EtherChannel network device provides network redundancy and load balancing by combining multiple physical network adapters into a single logical interface. If one adapter fails, traffic will automatically flow through the other available adapters in the channel, ensuring continuous network availability. References := IBM AIX EtherChannel Documentation

To resolve the issue with the power supply, the administrator should run diag with the option to log the repair action. This command will allow the system to acknowledge the hardware replacement and update the hardware error log, thus preventing further false reports regarding the power supply problem. References := IBM AIX Diagnostic Documentation

The rpm command is used to install, update, and manage packages from the AIX Toolbox for Linux Applications. This toolbox provides GNU and open source tools for AIX, and the rpm command handles the package management of these tools. References := IBM AIX Toolbox for Linux Applications

After creating an additional filesystem using the crfs -g rootvg command, the mklvcopy command should be run to mirror the corresponding logical volume. This command creates additional copies of the logical volume, ensuring that the mirroring is completed. References := IBM AIX Mirroring Documentation

Configuring both ethernet adapters as IEEE 802.3ad link aggregated with src_dst_port mode provides network resilience and better performance. This configuration uses link aggregation to combine the two adapters into a single logical interface, which balances the traffic load and provides redundancy in case one adapter fails. References := IBM AIX Link Aggregation Documentation

To upgrade from one release of AIX to another (such as from AIX 7.1 to AIX 7.2), the recommended method is a Migration Install. This method allows the administrator to upgrade the operating system while preserving existing data and settings. It updates the existing AIX installation to the new version, ensuring compatibility and continuity of system configurations and installed applications. The other methods, such as Preservation Install, New and Complete Overwrite Install, and Update Install, are either not suitable for upgrading to a new release or would result in data loss or incomplete updates. References := IBM AIX Documentation

In AIX, error entries related to a system crash are preserved by writing them to Non-Volatile Random Access Memory (NVRAM). These entries are processed and logged to the system error log when the system comes back up. This ensures that critical error information is not lost during a system crash. References := IBM AIX Documentation

The lsfs command in AIX gets its information from the /etc/filesystems file. This file contains definitions of all file systems and their attributes, including mount points, device names, and mount options. The lsfs command reads this information to display details about the file systems on the system. References := IBM AIX Documentation